Libraries are concerned about your privacy.  We do not keep records of what you have previously checked out and we do not give out your information.  That said, we want you to know that when you check out a Kindle eBook you must use your Amazon account.  At that point we no longer have control over protecting your records associated with this transaction.  At the very least, Amazon may use this information to recommend other items for purchase to you, as is the case with any purchases you make through the site.