What do I call The Book? O the dilemma!
I started with “The Rusalka Virus” as my working title, but I knew that was off the table, as it sounds like a contemporary thriller–not a novel set in an alternate version of 19th century Russia, featuring serfs turned hybrid supernatural creatures whose enhancements last the entire month, while their negative traits, such as vampirism and and pyromania, are tied to the full moon.