Learning the iOS 4 SDK for JavaScript Programmers: Create Native Apps with Objective-C and Xcode by Danny Goodman
318 pages; Publisher: O'Reilly Media; 1 edition (December 21, 2010)
Language: English; ISBN-10: 1449388450; ISBN-13: 978-1449388454

Professional iPhone and iPad Application Development Gene Backlin
600 pages; Publisher: Wrox (November 9, 2010)
Language: English; ISBN-10: 0470878193; ISBN-13: 978-0470878194

Beginning iOS 4 Application Development by Wei-Meng Lee
656 pages; Publisher: Wrox; 1 edition (October 12, 2010)
Language: English; ISBN-10: 0470918020; ISBN-13: 978-0470918029