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

#7 of 11 in The 39 Clues

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

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

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

#2 of 7 in The Bone Season

#4 of 11 in The 39 Clues

#4 of 5 in The Heroes of Olympus

#6 of 11 in The 39 Clues

#3 of 7 in Percy Jackson and the Olympians

#1 of 5 in The Riyria Chronicles

#1 of 3 in The Lord of the Rings

#4 of 6 in The Riyria Revelations

#3 of 3 in The Half Bad Trilogy

#1 of 3 in The Half Bad Trilogy

#2 of 3 in The Hunger Games

#1 of 6 in The Riyria Revelations

#3 of 6 in The Riyria Revelations

#2 of 6 in The Riyria Revelations

#0.1 of 4 in Robot

Middle-earth Legendarium

#3 of 5 in The Heroes of Olympus

#2 of 3 in Divergent

#1 of 2 in Triffids

#2 of 5 in The Heroes of Olympus

#2 of 2 in Triffids

#2.6 of 5 in The Riyria Chronicles

#3 of 8 in Harry Potter

#1 of 3 in Divergent