Recs if you like The Kane Chronicles Survival Guide...

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.

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!