Head First Algebra - a brain-friendly guide. - Tracey Pilone; Dan Pilone (O'Reilly, 2009)

Head First iPhone Development - a Brain-Friendly Guide: Covers iPhone 3.1 SDK. - Dan Pilone; Tracey Pilone (O'Reilly, 2010)

Head First iPhone and iPad Development - a Brain-Friendly Guide: Covers iOS 4 SDK and Xcode 4 (2. ed.). - Dan Pilone; Tracey Pilone (O'Reilly, 2011)