Here is a great book along these lines. Not always visual, but always (and often unexpectedly) simple. http://www.amazon.com/Q-E-D-Beauty-Mathematical-Proof-W

Here is a great book along these lines. Not always visual, but always (and often unexpectedly) simple. http://www.amazon.com/Q-E-D-Beauty-Mathematical-Proof-Wooden/dp/0802714315/ http://www.amazon.com/Q-E-D-Beauty-Mathematical-Proof-Wooden...