Features:

Download many of your favorite books from the included iBookstore.

Read a free sample of any book on the iBookstore before making it a part of your collection.

Reorder your books on your bookshelf or browse them in a list sorted by title, author, or category.

Organize your books and PDFs into personal Collections. Swipe left or right to jump between Collections.

Easily adjust your screen brightness to find the perfect lighting for any environment.

Change the font size and pick from six included type faces to make your books more comfortable to read.

Find a word, character, or phrase anywhere in your book with the built-in search feature.

Keep your bookmarks, notes, and your current page wirelessly in sync between iPhone, iPad, and iPod touch with the new automatic bookmark syncing feature.

However, I found many people want to know how to transfer ibooks such as ePub, PDF, Audiobook to Mac for backup as below.

Q1: Since the iPad came out, there have been a lot of talk about the iBooks or iBookstore application whereas you could purchase and download ebooks for the use of the iPad. I think it would be nice for Apple to do the same for there systems through iTunes. Is Apple developing an app for there computers? It would be great with the MacBook Pros where as one could turn pages with the trackpad. I see that Amazon has there Kindle pad and one could download and install there app on a Windows PC, Macintosh computer, iphone and Blackberry, and could read ebooks on there from ebooks purchased on Amazon through Kindle.

For resolving these problems, I search a tool--- iPhone iBooks to Mac Transfer in the website. The iPhone iBooks Transfer can allows iPhone users to transfer all or partial iBooks (ePub, PDF, Audiobook) from iPhone, iPhone 3G, iPhone 3GS, iPhone 4 to Mac/iTunes for backup and sharing. I hope it is helpful for us.