Front cover of GURPS Fantasy Folk: Elves
GURPS Fantasy Folk: Elves (2021, Alden Loveshade) is the consummate guide to all things elven. It offers racial templates for a wide range of elves, special abilities that suit the elder race, and stats for their gear and animal friends. But it isn't just a bunch of rules and numbers – there's also a great deal of detail on history, culture, and mindset, and practical advice on using elves in any genre.