Create Great iPhone Photos is a new book from Allan Hoffman that covers iPhone photo apps, tips and tricks to help users get the most out of their iPhone cameras. I don’t know that I’ve seen a book solely dedicated to using your iPhone’s camera, but if you’re really wanting to do more with your iPhone photography, you can find the book for about $19 on Amazon.
I bought the book – it’s excellent. Easy-to-follow advice and instructions, and beautiful images.