Caspian Sireno writes in different genres under different names, both paranormal and contemporary, and both new adult and young adult. Under this pen name, he writes new-adult paranormal romance and erotica between men who are gay, bisexual, pansexual, and asexual. His stories are written for adults to be read by adults (18+). He writes various types of creatures, but mermen and werewolves are his major focus. If he had to choose just one favorite creature type, it’d be mermen, hence his pseudonym.