Absolutely love Harry Potter and Percy Jackson!I have a lot of favourite book series instead of individual books, so;
- Red Queen trilogy
- Skulduggery Pleasant series
- Daughter of Smoke and Bone series
- Throne of Glass series
- Court of Thorns and Roses series
- The Last Dragon Chronicles
- The Harry Potter series
- Alice's Adventures in Wonderland
- The Chronicles of Narnia
- The Mortal Instruments series
- The Percy Jackson series
- The Infernal Devices series
and more lol