Professional Plone Development
A book about Plone 4 for developers
I am the author of Professional Plone 4 Development, a book about building web applications with Plone 4.This is the second edition (the first, called just 'Professional Plone Development' covers Plone 3). It was published by Packt Publishing in late August 2011.
Here is what Eric Steele, a book reviewer and Plone 4 release manager had to say about the book:
Aspeli’s years of experience in Plone development and project management are combined with an approachable writing style to create an engaging and highly-informative guide to working with Plone. Professional Plone 4 Development stands as an excellent resource for developers of all levels.