I am looking for devotinal books that are light hearted or humorous....short stories.
The classic for light short stories with an inspirational or religious slant is probably the Chicken Soup for the Soul series. A good one to start with might be Touched by an Angel. Another possibility is 7, by Jen Hatmaker--not short stories, but each chapter focuses on a different topic, and she has a nice humorous touch. She Who Laughs, Lasts! by Ann Spangler sounds like it might be a perfect fit--OPL has it as a downloadable audiobook. Sunday Morning Memories, by Don Reid, also sounds like a good possibillity.
I hope one of these is what you are looking for! If not, let us know and we can search further.