Recs if you like Hotel Valhalla Guide to the Norse Worlds: Your Introduction to Deities, Mythical Beings & Fantastic Creatures (Magnus Chase and the Gods of Asgard)...

Shorter books (under 200 pages) that are part of at least one quest. Many are also in the public domain, making them easily accessible when you want to grind for that next badge.

All the books of the Percy Jackson universe. Read in order starting from the bottom of this list.

The chronological order of reading Rick Riordan's books belonging to the Percy Jackson and the Olympians universe! [read from bottom to top of list]

List made by Unclaimed demigod on YouTube.

Not including the individual short stories that get combined into ‘Demigods and Magicians’ as it’s already on the list. Let me know if I’m missing any!

Some sources, some retellings, and some mythology-based fantasy.

Those books (guidebooks really) that were about fantasy realms or concepts but were framed like they were nonfiction, yep, got a list full of ‘em. (Books like this shouldn’t be this hard to find)