It could be more than one, I know I could never choose just one! :)
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Ummm
Any of the Wings of Fire books
And I can’t think of the other ones right now I might comment them later
-all Rick Riordan books
- Fablehaven and Dragonwatch by Brandon Mull
-Evil librarians by Brandon Sanderson
-The Bookwanderers by Anna James
-The Outsiders by SE Hinton
-Windswept by Kaitlin Bellamy
-Heartstopper by Alice Oseman
-Dragon Run by Patrick Matthews
-Explorer Academy by Trudi Truett