It is not all that unusual for writers to take a stab at other genres besides the one they usually inhabit, once in a blue moon................
I watched an excellent biopic about Marjorie Kinnan Rawlings not long ago. She was an aspiring gothic novel author but that genre wasn’t going anywhere for her and her agent told her so. She wrote letters to her agent about her new, post-divorce life in Florida that were full of life and character. She eventually followed her agent’s advice and wrote about her experiences in Florida and became very successful.