Books we have found useful. [[http://xunitpatterns.com/|xUnit Test Patterns]] by Gerard Meszaros. Lots of stuff about automated testing. [[http://worldcookery.com/|Web Component Development with Zope 3]] by Philipp von Weitershausen. [[http://martinfowler.com/books.html#refactoring|Refactoring]] by Martin Fowler Mandatory reading for anyone doing serious refactoring.