Sounds like a Christmas story; it's not. Ellen Wilson, our ingenious technology librarian, alerted me to this utility several months ago, and every month I'm really glad she did.
Sign up for an account. Enter your Mobile Public Library card number and password and Library Elf will connect with your account. You can set it up to let you know which books you have checked out and send you an email alert before they are due.
It works for MPL and Hancock County library for both me and my husband. You can check and see if any other libraries are included. There are a couple of academic libraries, but not this one, though I will look into it. Library Elf may not work with our system.
It has saved me from fines several times and I love just being able to see what I have, what I've put a hold on, and when everything is due. Perfect if you have kids that use the public library. So easy.