iShareBooks

This application lets you maintain the list of books you own and browse the list of books of your contacts. You could search the books based on title / author / ISBN. In the search results, you could tap on the book and add it to your bookshelf. Once added, the book would be available in your bookshelf. Only those users who have your phone number in their phone contact list would be able to see your bookshelf. Similarly you would be able to see bookshelf of people in your phone contact list if they are also using same app.
For each book in your bookshelf, you would be able to select whether you are ready to share the book or sell it. Also you could click on book image to view book details in browser.