TallGuyShort

I agree Applied Cryptography is a very interesting book, but that's because I'm a crypto nerd.

"Things to Make and Do in the Fourth Dimension" is really fun

I would recommend Schneier's Cryptography Engineering

"Digital Apollo" is probably the one that makes the best light / easy reading.

Last Light by Andy McNab (awesome)

(or its predecessor) Practical Cryptography over Applied Cryptography