Book Count and Reading Level for Popular Series
- Seven Series
- Death Note Series
- The 100 Series
- Chronicles of The One Series
- Andrea Oliver Series
- Million Dollar Duet Series
- Loot Series
- Art of the Adept Series
- The Fowl Twins Series
- Artemis Fowl: The Graphic Novels Series
- Artemis Fowl Series
- Pathfinder Series
- Daniel McEvoy Series
- W.A.R.P. Series
- A Chorus of Dragons Series
- Empirium Series
- Ender's Saga by Orson Scott Card
- The 39 Clues Series
- Treehouse Series
- Peter and the Starcatchers Series