Release It!

I've read the second edition of this book,
it contain absolutely gem lessons,
after reading that book, I start to build systems differently.

Great companion to Continuous Delivery. Covers more of the development and architecture side of things and, again, should be required reading for every architect and senior developer. Don't agree with everything he says about database deployment; declarative development is much more useful than trying to code state transitions, especially when structure is in transition.