I just got finished reading Apache OFBiz Cookbook (Open Source: Community Experience Distilled) by Ruth Hoffman.
I have been writing Ofbiz code since before it was an Apache project. This book would have saved me six months of digging through Ofbiz code and inspite of my nearly a decade of experience, I still learned several new things in it. I highly recommend this book to everyone, beginner and expert alike and strongly recommend this book for anyone just getting started. It is well written and worth every penny. When you get the Data Resource book, get this one too and read it first. Amazon has it here https://www.amazon.com/gp/product/1847199186/ref=oh_aui_detailpage_o05_s00?i e=UTF8&psc=1 I have never met or spoken to Ruth even though she posts on this forum from time to time. Thanks Ruth. Skip