Novel info
The Alchemist and the Moon (Luna/Theo -Harry Potter)

He’s losing himself. Or maybe, he’s becoming something he was always meant to be.
Desperate for answers, he turns to Luna Lovegood. She sees things others don’t, and while most people dismiss her visions as nonsense, Theo isn’t so sure. Luna doesn’t just recognize The Emerald Codex—she’s seen its symbols before, in the ruins of an ancient alchemical site her mother once studied.
Together, they begin to uncover the truth. About the book. About their families. About a centuries-old conspiracy that ties their bloodlines together in ways neither of them expected.