The paranormal beings for today are the Leprechaun and the Langsuyar. The leprechaun is obviously very well known. Anyone ever watch those horror movies with the leprechaun? The langsuyar, however, is not heard of as often. It is a female vampire that gives birth to undead offspring. The original legend goes much more in-depth than I could possibly type up in a few sentences, but you should definitely look it up some time. She would be perfect for a horror story.
Anyways, on to the "L" books:
Legacy of a Dreamer by Allie Jean
Lessons Learned by Sydney Logan
Let it Go by Brooklyn James
Lichgates (Grimoire Trilogy #1) by S.M. Boyce (FREE)
Lunula by Alyssa Auch