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Description
General Relativity: The Theoretical Minimum -- Leonard Susskind, HardcoverThe latest volume in the New York Times bestselling physics series explains Einstein's masterpiece: the general theory of relativity He taught us classical mechanics, quantum mechanics, and special relativity. Now, physicist Leonard Susskind, assisted by a new collaborator, Andr Cabannes, returns to tackle Einstein's general theory of relativity. Starting from the equivalence principle and covering the necessary mathematics of Riemannian spaces and
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Best in 7 days
Best in 7 days
Best in 7 days
Best in 7 days
4.3 ★★★★★
Based on 2062 reviews
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Product Reviews
★★★★★ 5
Consistently Warm Cup Every Time
Color: Black, Color: Black
I resisted getting an electronic coffee warmer, because I hadn't had one in years. I am so glad that I changed my mind. I am no longer having to microwave my coffee again and again as it gets cold. I love that this coffee warmer has multiple temperature options. I love that I can adjust the number of hours (1-12) until I would like it to automatically shut off. It heats up quickly, so you needn't plan ahead. When you want it, it is fully functional on the spot. Since it has a heating function, my policy is to unplug it when not in use. I wouldn't give this as a gift, not because it isn't awesome, but because owning it requires a personal commitment to using it responsibly. And you must have a suitable cup. My cup, as you see here, is a celodon cup. It heats perfectly well even though the base has a shallow rim rather than a flat bottom, which makes direct contact with the heating table. If you have a similar cup, be assured that will be just fine and your coffee or other liquid will stay warm. Its versatile functionality and beautiful design make this an excellent value for the money. To me, there's nothing like a good cup of coffee in the morning and this warmer makes all the difference as it is uniformally a perfect cup, even if I get interrupted.
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Reviewed in the United States on April 16, 2026
★★★★★ 5
Nice size and works well
Color: Black
I got this to replace a rather inexpensive mug warmer that had quit working just a few months after purchase. This one is nice, you can adjust the temp, adjust how long it stays on, and it has an easy to read display so you know them temp and auto shut-off time. Its versatile as it fits a variety of mugs/cups and it works really well.
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Reviewed in the United States on April 29, 2026
★★★★★ 5
Best mug warmer I’ve ever had!
Color: Black
This does what I had hoped my other two mug warmers would do. Actually keep my coffee hot. I also love that I can set the timer so that I don’t accidentally leave it on. Additionally, my other two warmers were activated by setting the cup down on the warmer, which meant that if somebody sat something else beside a coffee cup on it, it burned it. And that did happen. This one is only hot when you turn it on. I can also change the temperature settings and choose how long I want it to be on up to 12 hours. I definitely will buy this again for another room in the house.
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Reviewed in the United States on May 29, 2026
★★★★★ 5
Simple and ir works well
Color: White
Keeps my beverages hot. I like that is has 3 temperatures to select.
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Reviewed in the United States on June 9, 2026
★★★★★ 5
Excellent price quality and delivery. ✅
Color: Black
Love this coffee warmer. It’s perfect in every way. Not cheap junk. It is good quality. The heating base is large enough to hold my large coffee mug.. It has four rubber feet on the bottom for stability, about a quarter size digital temperature viewing, yes, it does heat up fast. I love everything about it. It is the best $20 purchase I have made in years ❤️ I highly recommend this one if you’re looking for one to keep your coffee warm 😎
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Reviewed in the United States on May 20, 2026
