I asked my wife and kids for suggestions. Here they are, in no particular order:

- The Bronze Bow

- Tuttle Twins

- The Oddmire series

- Fablehaven series

- Beyonders series (read before The Five Kingdoms)

- The Five Kingdoms series (read after Beyonders)

- Redwall

- The Giver

- The Mysterious Benedict Society

- Harper

- The Phantom Tollbooth

- Wondla series

- Where the Red Fern Grows

- Pollyanna

- The "Awesome Austen" books (slightly simplified versions of Jane Austen's books)

I hope that's enough to get you started! 😅