The Book Arts Web (via futureofthebook.com)
Confessions of a Bookplate Junkie
Animated da Vinci Illustrations
Ten Things You Didn’t Know About Your Books by Adrian Johns

Not a book: The Antikythera Mechanism, an ancient Greek computer:

Scientists have finally demystified the incredible workings of a 2,000-year-old astronomical calculator built by ancient Greeks. A new analysis of the Antikythera Mechanism, a clock-like machine consisting of more than 30 precise, hand-cut bronze gears, show it to be more advanced than previously thought—so much so that nothing comparable was built for another thousand years.