I wanted to posts books this way to try and free my shelves of many books but wondering how to do it?  Any advice would be greatly appreciated.

Emma,

You would make a post in the book bazaar saying that you are offering a 2-1 deal on your bookshelf.  Then, ask the responders to order one book and either PM  you or post in the thread (your choice--some members prefer one, some the other) which book they would like free.  You would then remove the free book from you bookshelf and send it with the one they ordered.

I've also heard that some people will just have the member order both books and will send one of the credits back.  But that can run you in to trouble if you get a lot of people responding to your deal since the site limits you to the 50 credits monthly that you can transfer between members.  If you like to use your credits in games or RAOK, etc. that may limit the number of credits you have available to send back to people.

The Book Bazaar is a discussion forum, and discussion forums are on the Community menu.

You can also add a note that you have a 2 for 1 deal going to your signature line and to your bookshelf header.