Our publisher warned us that a second edition would be much more difficult. We did not understand that back then, but he was right. We needed to get more coauthors on board to account for the growth of Groovy and we are very grateful that Hamlet D’Arcy, Cédric Champeau, and Erik Pragt joined the group. Paul King invested an enormous amount of extra time and I (Dierk) am also very grateful to him for that.
We’re deeply indebted to our technical reviewing team: Atul Khot, David McFarland, Jakob Mayr, Ken Shih, Paul Grebenc, Phillip Warner, Rick Wagner, Robert O’Connor, Ronald Tischliar, Scott Ruch, Vinod Panicker, and Vladimír Oraný, with special thanks to our technical editor Michael Smolyak and technical proofreader Gordon Dickens.
While the book was in development, readers could subscribe to Manning’s Early Access Program (MEAP) to get the content early and to provide feedback. We received so many valuable suggestions that we cannot possibly list everyone’s name, but we would like to say a big thank you to all of you! The MEAP ran longer than any other and while we are not proud of that record, we thank everyone for their patience and hope that you will find the book up-to-date and worth the wait.