Recs if you like Once & Future (Once & Future, #1)...

original fantasies INSPIRED by mythology and folklore (Greek, Arthurian, Norse, Buddhist, Slavic, Jewish, Irish, and more!)

Retelling of classic fairytales and stories where at least one character is a different gender than the original HRCYED 3.0- Retellings

Books about/inspired by Arthurian Legends

Feel free to add any others in the comments