Mastering Swift 2 By Jon Hoffman

Mastering Arduino Programming: A Quick Guide to Arduino Programming with Simple

Mastering Arduino, Brand New, Free shipping in the US

Mastering Arduino: A project-based approach to electronics,... - Hoffman, Jon

Mastering Swift 4: An in-depth and - Paperback, by Hoffman Jon - Very Good

Mastering Swift 4 - Fourth Edition by Jon Hoffman (2017, Trade Paperback)

Mastering CMake by Hoffman, Bill; Martin, Ken