The University: An Owner’s Manual, by Henry Rosovsky: An entertaining and informative book on Academic life, written by the former Dean of Harvard’s Faculty of Arts & Sciences (and economics professor). I read this many years ago while doing my PhD and really enjoyed it. Re-reading it recently and with the benefit of some hindsight, I found it as good as the first time–despite a few parts that are a bit outdated. (As a bonus: it contains a wealth of interesting anecdotes, especially about the second part of 20th century, that might interest those working on the economics of education).
Boomerang, by Michael Lewis: A helicopter tour of European economies and their debt problems. Entertaining, Michael Lewis style.
The Calculus of Friendship, by Steven Strogatz: If you enjoyed math problems in high school, chances are you will like this book. The lifelong friendship that starts between a high school student who ends up becoming an accomplished math professor and his high school calculus teacher, chronicled through their letters spanning several decades. Many interesting math problems you may recognize along with very clever and intuitive solutions.