This is a good book, though a few years old now: Beautiful Architecture: Leading Thinkers Reveal the Hidden Beauty in Software Design (http://shop.oreilly.com/

This is a good book, though a few years old now: Beautiful Architecture: Leading Thinkers Reveal the Hidden Beauty in Software Design (http://shop.oreilly.com/product/9780596517984.do http://shop.oreilly.com/product/9780596517984.do) Disclaimer: I'm the lead developer for one of the featured projects (though wasn't at the time).