#1 of 5 in The Heroes of Olympus

#1 of 11 in The 39 Clues

#1 of 3 in The Kane Chronicles

#2 of 17 in Ranger's Apprentice

#4 of 17 in Ranger's Apprentice

#5 of 11 in The 39 Clues

#3 of 4 in The Heir Chronicles

#1 of 7 in Percy Jackson and the Olympians

#4 of 7 in Percy Jackson and the Olympians

#4 of 11 in The 39 Clues

#11 of 11 in The 39 Clues

#4 of 6 in The 39 Clues: Cahills vs. Vespers

#1 of 4 in Seven Realms

#7 of 11 in The 39 Clues