An everyday read

I do enjoy browsing a good bookshop, as I did this afternoon.  What is remarkable is that I managed to leave the shop without buying anything - although I was sorely tempted and may return soon.

This guy obviously was tempted - and he couldn't wait till he got home to start reading.  Heavy reading, though.  If you can't see the title, it is "General Relativity - The Theoretical Minimum".  Good bedtime reading for insomniacs.

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