Peter Woit in Not Even Wrong:
Jim Holt has a new book out, a collection of essays entitled When Einstein Walked with Gödel. I wrote enthusiastically about his last book (Why Does the World Exist?) here and, if you have any interest at all in the overlap of mathematics, science and philosophy, I recommend this one just as highly. Holt is pretty much a unique example of someone able to regularly write about topics in this area in a manner that is both enlightening and entertaining.
This is a book of essays written on different topics for different venues, of too great a variety to try and itemize here. Most of them have some sort of connection to mathematics and philosophy, typically centering on one idea or one, often historical, figure. Holt loves to write about the most abstract of ideas (the subtitle of the book is “Excursions to the Edge of Thought”), but in the context of the particular very human qualities of the thinkers responsible for them.