Einstein: His Life and Universe

What were personal qualities of the greatest scientist of the twentieth century that differentiated him from his contemporaries? I have read a lot of books about Albert Einstein, who was one of my childhood heroes (along with the Lone Ranger).

The Immortal Game: A History of Chess

One might expect that an especially memorable chess match would have been a world championship game, or at least a tournament competition. However, one of the most famous matches ever played was an exhibition that had no significance for any competition.

The Art of the Catapult: Build Greek Ballistae, Roman Onagers, English Trebuchets, and More Ancient Artillery

Gurstelle also wrote "Building Bots: Designing and Building Warrior Robots", but I haven't read that one. "Catapult" is definitely in the spirit of "build it yourself", that I like to encourage here and also in "The Cost-Effective Teacher" feature in the print Journal.