I thank Drools lead Mark Proctor and his team that consists of Edson Tirelli, Michael Neale, Kris Verlaenen, Toni Rikkola, and other contributors for giving me something to write about. They were of great help while I was writing the book. Edson and Mark reviewed the book and helped me to correct various inaccuracies. I'd like to thank all reviewers and the whole editorial team for their patience and help while I was writing this book. In particular, Sarah Cullington, Siddharth Mangarole, Aanchal Kumar, Conrad Sardinha, James Taylor, Sammy Larbi, Zainab Bagasrawala, Shilpa Dube, Lata Basantani, and other anonymous reviewers. I thank James Taylor for writing the foreword and reviewing the book. I am honored that he chose to participate in t....