I keep sending my husband books from Amazon but they keep sending back why

[Amazon](http://www.amazon.com/b/ref=as_sl_pc_tf_lc?node=283155&tag=inmatecom-20&camp=15329&creative=394453&linkCode=ur1&adid=1NK4T3Z8XDKYJ0S12D53&&ref-refURL=https%3A%2F%2Fwww.inmateaid.com%2Fpages%2Fdetails%2Fsend-books-to-an-inmate-in-prison-or-jail) is one of the only companies that may deliver books to inmates. You have to enter the inmate's name, ID number and the correct address of the facility. You have to buy "new paperback books", the used books are sold by third party affiliates and those books will get rejected. There are no other tricks to it, other than staying away from the other book sellers on the Amazon site that sell used books.