Beginning iPad Development for iPhone Developers: Mastering the iPad SDK

This book is an excellent read for someone with prior iPhone (iOS) programming knowledge looking for a book without 100 pages of reminders. Many of the other books are written as a combination of thoughts for "You're new to iOS and new to iPad.." I didn't want to pay for a book and then have the first half of it all stuff I already knew. This book is written with a strong assumption (as noted immediately in the book itself and the title) that you need to understand how to program an iPhone first, then pick up this book to get straight to what matters in programming an iPad. If you know the basics of programming for iPhone, I'd suggest this your first title for expanding your knowledge to programming an iPad.