--- product_id: 4643988 title: "Six Not-So-Easy Pieces" price: "₪66" currency: ILS in_stock: true reviews_count: 13 url: https://www.desertcart.co.il/products/4643988-six-not-so-easy-pieces store_origin: IL region: Israel --- # Six Not-So-Easy Pieces **Price:** ₪66 **Availability:** ✅ In Stock ## Quick Answers - **What is this?** Six Not-So-Easy Pieces - **How much does it cost?** ₪66 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.il](https://www.desertcart.co.il/products/4643988-six-not-so-easy-pieces) ## Best For - Customers looking for quality international products ## Why This Product - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Description Learn about Einstein's theory of relativity from a physics Nobel laureate and "one of the greatest minds of the twentieth century" ( New York Review of Books ) in six memorable lessons It was Richard Feynman's outrageous and scintillating method of teaching that earned him legendary status among students and professors of physics. From 1961 to 1963, Feynman delivered a series of lectures at the California Institute of Technology that revolutionized the teaching of physics. In Six Not-So-Easy Pieces , taken from these famous Lectures on Physics , Feynman delves into one of the most revolutionary discoveries in twentieth-century physics: Einstein's theory of relativity. The idea that the flow of time is not a constant, that the mass of an object depends on its velocity, and that the speed of light is a constant no matter what the motion of the observer, at first seemed shocking to scientists and laymen alike. But as Feynman shows, these tricky ideas are not merely dry principles of physics, but things of beauty and elegance. No one — not even Einstein himself — explained these difficult, anti-intuitive concepts more clearly, or with more verve and gusto, than Feynman. Filled with wonderful examples and clever illustrations, Six Not-So-Easy Pieces is the ideal introduction to the fundamentals of physics by one of the most admired and accessible physicists of all time. “There is no better explanation for the scientifically literate layman.” – Washington Post Book World Review: Harder than 6 easy pieces, but not extremely hard. - The title of this book probably scares off many readers, but it need not do so. This book is a sequel to Feynman's "Six Easy Pieces". Both books consist of lectures taken from Feynman's three volume lecture series, which was used for a two-year introductory physics course at Cal Tech. "Six Not So Easy Pieces" is not as easy as "Six Easy Pieces". The latter is accessible to most high school students, but the former is not. The not so easy pieces are: · Vectors · Symmetry in Physical Laws · Relativistic Energy and Momentum · Space-Time · Curved Space "Six Easy Pieces" was a bit unfocused because it covered a number of different topics. In contrast, "Six Not So Easy Pieces" is focused on just one topic, Relativity Theory. Feynman uses each topic to build up to Einstein's theory of gravitation, which is not the easiest subject to grasp. Relativity theory is generally covered in one of two ways. Some books give a general treatment, focusing on the many implications of the theory, with no mathematics. At the other extreme are texts that require considerable knowledge of matrix algebra and differential equations. This book takes a middle ground. There is some math, but only some simple algebra and vector analysis. (The vector analysis does go beyond what is taught in high school, venturing into 4 dimensional vectors, but Feynman shows this to be only a modest extension from the typical 3 dimensional vectors.) Feynman dispenses with the usual introduction to relativity theory that employs moving trains and lightening strikes. Instead he starts with a superb analysis of the Michelson-Morley experiment (alone this is worth the price of the book) and the Lorenz transformation that was developed to explain the null result that Michelson-Morley obtained. He then uses this as the starting point for the analysis of special relativity. This is followed with a discussion of relativistic energy and momentum, subjects that are generally left out of "popular" treatments of relativity theory. The final chapter discusses curved space and Einstein's theory of gravity. These topics will be hard for people without some basic physics background, but are not too advanced for the intended audience of college undergraduates, although Feynman admitted that only the best students did as well as he had hoped. As with all of Feynman's books there is a wealth of knowledge packed a small package (in this case a bit less than 150 pages) and while these six lectures are not a substitute for a complete course in the special and general theories of relativity, it does hit the highlights and as usual provides very valuable insights for readers with all levels of knowledge. Review: Planning Ahead For Your Space Travels? - Brilliant lecture; quite clearly informative about some of those difficult theoretical science "tangles" of modern day physics. I plan to read R. P. Feynman's other published lectures. But for now, at least I have a better, basic understanding of how one gets from point A to point B, and why it matters. However, it is helpful to remember some Euclidean geometry and vector equations to keep from getting totally lost along the way. Sometimes I found myself reading several sections twice or three times over, just to make certain that I was grasping the material. Given the world's growing population and the looming climate change America's governments are especially so unwilling to deal with, I would recommend that more of earth's inhabitants acquaint themselves with Professor Feynman lecture materials, in preparation for moving to another planet, or perhaps another galaxy, even. Astrophysicists have been quietly discovering thousands of planetary systems, outside of the Milky Way. And they appear remarkably unique. In some, a gas giant, like Jupiter, has it orbit closest to its sun, while planets of smaller masses are further out. A brave new world! No one is certain if the current acceleration of our expanding universe, as we know it, will ever slow down, for our space probes and our inhabited space ships to reach any of those alternatives "to life on earth." So, as one prepares for the eventual colonization of other planets, we had better make certain that Plan B, "living on earth," remains viable for us to fall back on, if absolutely necessary. ## Features - Orders are despatched from our UK warehouse next working day. ## Technical Specifications | Specification | Value | |---------------|-------| | Best Sellers Rank | #30,513 in Books ( See Top 100 in Books ) #11 in Relativity Physics (Books) | | Customer Reviews | 4.6 out of 5 stars 1,284 Reviews | ## Images ![Six Not-So-Easy Pieces - Image 1](https://m.media-amazon.com/images/I/71JjRjyiojL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Harder than 6 easy pieces, but not extremely hard. *by M***T on October 17, 2007* The title of this book probably scares off many readers, but it need not do so. This book is a sequel to Feynman's "Six Easy Pieces". Both books consist of lectures taken from Feynman's three volume lecture series, which was used for a two-year introductory physics course at Cal Tech. "Six Not So Easy Pieces" is not as easy as "Six Easy Pieces". The latter is accessible to most high school students, but the former is not. The not so easy pieces are: · Vectors · Symmetry in Physical Laws · Relativistic Energy and Momentum · Space-Time · Curved Space "Six Easy Pieces" was a bit unfocused because it covered a number of different topics. In contrast, "Six Not So Easy Pieces" is focused on just one topic, Relativity Theory. Feynman uses each topic to build up to Einstein's theory of gravitation, which is not the easiest subject to grasp. Relativity theory is generally covered in one of two ways. Some books give a general treatment, focusing on the many implications of the theory, with no mathematics. At the other extreme are texts that require considerable knowledge of matrix algebra and differential equations. This book takes a middle ground. There is some math, but only some simple algebra and vector analysis. (The vector analysis does go beyond what is taught in high school, venturing into 4 dimensional vectors, but Feynman shows this to be only a modest extension from the typical 3 dimensional vectors.) Feynman dispenses with the usual introduction to relativity theory that employs moving trains and lightening strikes. Instead he starts with a superb analysis of the Michelson-Morley experiment (alone this is worth the price of the book) and the Lorenz transformation that was developed to explain the null result that Michelson-Morley obtained. He then uses this as the starting point for the analysis of special relativity. This is followed with a discussion of relativistic energy and momentum, subjects that are generally left out of "popular" treatments of relativity theory. The final chapter discusses curved space and Einstein's theory of gravity. These topics will be hard for people without some basic physics background, but are not too advanced for the intended audience of college undergraduates, although Feynman admitted that only the best students did as well as he had hoped. As with all of Feynman's books there is a wealth of knowledge packed a small package (in this case a bit less than 150 pages) and while these six lectures are not a substitute for a complete course in the special and general theories of relativity, it does hit the highlights and as usual provides very valuable insights for readers with all levels of knowledge. ### ⭐⭐⭐⭐⭐ Planning Ahead For Your Space Travels? *by N***L on December 29, 2016* Brilliant lecture; quite clearly informative about some of those difficult theoretical science "tangles" of modern day physics. I plan to read R. P. Feynman's other published lectures. But for now, at least I have a better, basic understanding of how one gets from point A to point B, and why it matters. However, it is helpful to remember some Euclidean geometry and vector equations to keep from getting totally lost along the way. Sometimes I found myself reading several sections twice or three times over, just to make certain that I was grasping the material. Given the world's growing population and the looming climate change America's governments are especially so unwilling to deal with, I would recommend that more of earth's inhabitants acquaint themselves with Professor Feynman lecture materials, in preparation for moving to another planet, or perhaps another galaxy, even. Astrophysicists have been quietly discovering thousands of planetary systems, outside of the Milky Way. And they appear remarkably unique. In some, a gas giant, like Jupiter, has it orbit closest to its sun, while planets of smaller masses are further out. A brave new world! No one is certain if the current acceleration of our expanding universe, as we know it, will ever slow down, for our space probes and our inhabited space ships to reach any of those alternatives "to life on earth." So, as one prepares for the eventual colonization of other planets, we had better make certain that Plan B, "living on earth," remains viable for us to fall back on, if absolutely necessary. ### ⭐⭐⭐⭐⭐ Feynman’s Brilliant Relativity Treatise *by T***M on May 20, 2026* If you have studied Special or General Relativity in college, nothing can compare to Feynman’s treatise. Taken directly from his Caltech lecture volumes. ## Frequently Bought Together - Six Not-So-Easy Pieces: Einstein’s Relativity, Symmetry, and Space-Time - Six Easy Pieces: Essentials of Physics Explained by Its Most Brilliant Teacher - The Pleasure of Finding Things Out: The Best Short Works of Richard P. Feynman (Helix Books) --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.il/products/4643988-six-not-so-easy-pieces](https://www.desertcart.co.il/products/4643988-six-not-so-easy-pieces) --- *Product available on Desertcart Israel* *Store origin: IL* *Last updated: 2026-05-24*