The book describes - in delightful pop-up glory - everything from read/write heads to the inner workings of a CRT.
http://jonathanryan.org/2009/04/28/pop-up-guide-to-the-personal-computer/
From the Upcoming ueue, submitted by JonathanRyan.
Update 5/2/09 by Alex: Here's a YouTube clip of the book in action.