First and foremost, I’d like to thank the readers of the first edition. Your countless emails and comments from all over the world have been a true inspiration for writing this book, and many new topics were inspired by your feedback.

The philosophy and structure of this book is the same as that of the first edition, but because of the transition from LEGO MINDSTORMS NXT to EV3, it was essentially rewritten from scratch. This was only possible thanks to the help of many talented people.

Many thanks go to Claude Baumann for reviewing the book for technical accuracy and for suggesting improvements. Thanks also to Marc-André Bazergui, Martijn Boogaarts, Kenneth Madsen, and Xander Soldaat for testing prototypes of the robots featured in the book as early as 2012.

Further thanks to the people at No Starch Press for making the first edition a success and for working with me on this new edition. Thanks to my publisher William Pollock, to my editor Seph Kramer, to Serena Yang for keeping the project on schedule, to Riley Hoffman and Alison Law for laying out the raw text on colorful pages, and to Leigh Poehler for dealing with all my business-related questions over the past years.

Thanks to the LEGO Group for developing such an inspirational and educational robotics kit, and for involving the community early in the design process. Thanks to the LEGO MINDSTORMS EV3 team, including Camilla, David, Flemming, Henrik, Lars Joe, Lasse, Lee, Linda, Marie, Steven, and Willem.

Thanks to the LDraw community for developing the tools required to create the building instructions in this book. In particular, thanks to Philippe Hurbain for creating 3D LDraw models of the EV3 components, to Michael Lachmann for creating MLCad, to Travis Cobbs for creating LDView, and to Kevin Clague for developing LPub 4 and LSynth. Also, thanks to John Hansen for creating the EV3 screen capture tool.

Finally, thanks to my friends and family for your support throughout the lengthy process of writing this book. Most of all, thanks to Fabiënne for your endless encouragement to finish this project. Thank you—you’re the best.