Princton Companion to Mathematics

[neutrino]

It's been added to my wish-list.

http://press.princeton.edu/titles/8350.html

Peter Woit's post about the book, on his blog: http://www.math.columbia.edu/~woit/wordpress/?p=1019

 

[Cincinnatus]

A few sample articles from that book are available online. I remember finding them linked from Terry Tao's blog a while back... They're great!