Einstein's Unfinished Revolution

 By Lee Smolin.

Am catching up on my theoretical physics, quantum mechanics in particular. QM is a very accurate theory, but it has sharp limits. For example, it doesn't explain relativity. Smolin dives in on the problems, some of the alternatives, and the problems that the alternatives have.

Less is Lost

By Andrew Sean Greer

A fun follow up to the original less book. Very well written. I don't know that the plot matters. This is the story of a gay and moderately successful middle age man on a series of misadventures.