Love is a surprise! Especially when you’re all dressed up and in jail.
This book was originally published in 1940 as Letty and the Law. When Bantam republished the book in 1948, the title got changed to Love is a Surprise!
I couldn’t find much info on cover artist Bert Lannon, beyond the fact that he appears to be one of the few artists from the pulp and paperback era to regularly signed his name to his work.