I wouldn't have been able to write this book, or the second edition, without the help of the wonderful Laurie Edwards, who, while working on her own projects took the time to keep me organized and focused. Without her continuous and undying support, I dare say this book (along with every other project I have embarked on) would never have happened. Development heroes of mine include David Hernández (@dahernan on GitHub), who delights in telling me that my ideas are "terrible" before later falling in love with them; Ernesto Jiménez, who works extremely hard and extremely effectively on private and public projects alike; Tyler Bunnell (@tylerb on GitHub), who I learned Go with; and Ryan Quinn (@mazondo on GitHub), who seems to build an app a day and is living proof of how building something, however simple, is always better than building nothing. Thanks also goes out to Tim Schreiner for engaging in debates with me over the good and bad bits of Go as well as being my go-to guy on matters close to and beyond the fringes of computer science. Thanks go to the core Go team for building such a fun language and to the entire Go community, who have saved me months of development with their contributions. A special shout out to the Women Who Go and Go Bridge (@golangbridge on Twitter) groups, who are working increasingly hard to help us reach and maintain a rich and diversely populated community. Special thanks also goes to everyone who has supported me in my life and helped me in developing what I love into a career, including, but not limited to, Nick and Maggie Ryer, Chris Ryer, Glenn and Tracey Wilson, Phil Jackson, Aaron Edell, Sek Chai, David Hernández, Ernesto Jiménez, Blaine Garst, Tim and Stacey Stockhaus, Tom Szabo, Steve Davis, Mark Gray, John Motz, Rory Donnelly, Piotr Rojek, Corey Prak, Peter Bourgon, Andrew Gerrand, Dave Cheney, William (Bill) Kennedy, Matt Heath, Carlisia Campos, Tiffany Jernigan, Natalie Pistunovich, Simon Howard, Sean Thompson, Jeff Cavins, Edd Grant, Alan Meade, Steve Cart, Andy Jackson, Aditya Pradana, Andy Joslin, Kal Chottai, Tim Ryer, Emma Payne, Corey and Ashton Ryer, Clair Ryer, Gareth and Dylan Evans, Holly Smitheman, Phil Edwards, Tracey Edwards, Kirsten, Megan and Paul Krawczyk, Alex, Adriénne and Ethan Edwards, Chantelle and Greg Rosson, and all my other great friends and family. In the loving memory of Maggie Ryer, 1961 - 2015.