|Image from the St. Louis County Library website|
According to the SLCL website, SELF-e is "a discovery platform designed to expose your ebook(s) to more readers via public libraries locally and nationwide."
This initiative is a collaboration between Library Journal and BiblioBoard. Depending on the outcome of a rigorous review process by Library Journal, the SELF-e program permits local authors to upload their e-book: into Library Journal's SELF-e Select collection or (if not selected for the Library Journal's SELF-e Select collection) into the Indie Missouri collection.
Note: From what I read in the FAQs, there is no cost to participate -- but authors do not receive royalties either. The chief benefit is getting your work recognized.
So, if you're looking for exposure (other than from frostbite) for your e-book, you can find complete details in the FAQ section, along with a link to the terms of agreement.