The Lightning Thief is written by Rick RiordanRick Riordan wrote Vespers RisingVespers Rising is written by Rick Riordan
[Human]: Do you know anything about the book The Lightning Thief? [Assistant]: Sure, it was written by Rick Riordan. It's a Young-adult Fiction book. Its part of a Series, would you want to hear more about those books? [Human]: Ues, I like Young adult fiction book. Please tell me more about the books in the series. 
The Sea of Monsters is written by Rick Riordan and was released in 2006.