Could be the book you loved the most, the series you daydreamed about, book that inspired you, fascinated you, your comfort read…anything.
And why.
I LOVED the Anne McCaffrey Pern books. I would walk around daydreaming about new adventures set in the books’ world. The Dragonsong books really connected my love of music with my love of fantasy (and animals).
Yeah I still love the book and its sequels and there are plenty of ways to read it without financially supporting the author’s agenda so I’ll still recommend it
As an aside, it did directly lead me to reading Asimov’s Foundation and now I’ve gotta find the time to reread that and finish the series