Which Rick Riordan's book is the most successful?
Percy Jackson Series
The Lightning Thief
The Lightning Thief
Percy Jackson and the Olympians
The Lightning Thief
Percy Jackson & the Olympians
The Heroes of Olympus
Percy Jackson & The Olympians
The Titan's Curse
Percy Jackson and the Olympians
The Lightning Thief
Percy Jackson & the Olympians
The Heroes of Olympus
The Titan's Curse
The Lightning Thief
Percy Jackson and the Olympians
The Order of the Phoenix
Percy Jackson & The Olympians
The Kane Chronicles
The Titan's Curse
The Lightning Thief
The Sword of Summer
Percy Jackson and the Olympians
The Heroes of Olympus
Percy Jackson & the Olympians
The Fellowship of the Ring
The Order of the Phoenix
The Kane Chronicles
The Titan's Curse
The Lightning Thief
The Hidden Oracle
The Sword of Summer
Percy Jackson and the Olympians
Percy Jackson & The Olympians
The Heroes of Olympus
Percy Jackson & the Olympians
The Fellowship of the Ring
The Kane Chronicles
Percy Jackson & the Olympian
The Hidden Oracle
Percy Jackson and the Olympian
The Lightning Thief
The Godfather Part III
Percy Jackson and the Olympians.
The Titan's Curse
The Sword of Summer
The Sorcerer's Apprentice
Percy Jackson and the Olympians
Percy Jackson & The Olympian
The Order of the Phoenix
The Hidden Oracle
The Heroes of Olympus
The Kane Chronicles
Percy Jackson & The Olympians
The Lightning Thief
The Godfather Part III
Percy Jackson and the Olympian
The Sword of Summer
The Titan's Curse
Percy Jackson and the Olympians.
The Sorcerer's Stone
Percy Jackson and the Olympians
Percy Jackson & the Olympian
Percy Jackson & the Olympians
The Hidden Oracle
The Kane Chronicles
The Mark of Athena
The Lightning Thief
Percy Jackson & The Olympian
The Godfather Part III
The Sword of Summer
Percy Jackson and the Olympian
The Order of the Phoenix
The Titan's Curse
Percy Jackson and the Olympians.
The Heroes of Olympus
Percy Jackson and the Olympians
The Hidden Oracle
The Lightning Thief, Percy Jackson
Percy Jackson & the Olympian
Percy Jackson & The Olympians
The Kane Chronicles
The Lightning Thief
The Godfather Part III
Percy Jackson & the Olympians
Percy Jackson and the Olympian Gods
The Sword of Summer
Percy Jackson and the Olympian
The Titan's Curse
The Last Olympian
Percy Jackson and the Olympians.
Percy Jackson
The Mark of Athena
Percy Jackson and the Olympians
The Hidden Oracle
The Heroes of Olympus
Percy Jackson and the Olympian Prince
The Order of the Phoenix
The Kane Chronicles
The Lightning Thief
The Godfather Part III
The Sword of Summer
Percy Jackson & the Olympian
Percy Jackson and the Olympian
The Titan's Curse
Percy Jackson
Percy Jackson and the Olympian Gods
Percy Jackson and the Olympians.
The Hidden Oracle
Percy Jackson and the Olympians
Percy Jackson & The Olympians
Percy Jackson & the Olympians
The Last Olympian
Percy Jackson and the Olympian Prince
The Lightning Thief.
The Sorcerer's Tomb
The Kane Chronicles
The Heroes of Olympus
The Son of Neptune
The Lightning Thief
The Godfather Part III
The Last Olympian, The Lightning Thief
Percy Jackson
The Sword of Summer
The Titan's Curse
Percy Jackson and the Olympian
The Order of the Phoenix
The Hidden Oracle
Percy Jackson and the Olympians.
Percy Jackson and the Olympian Gods
Percy Jackson and the Olympians
Percy Jackson & the Olympian
The Lightning Thief.
Percy Jackson and the Olympian Prince
The Godfather
The Last Olympian
The Kane Chronicles
The Lightning Thief
The Godfather Part III
The Lightning Thief, Percy Jackson
The Legend of Sleepy Halliwell
The Lightning Thief & The Dark Tower
Percy Jackson & the Olympians
Percy Jackson
The Hidden Oracle
The Titan's Curse
Percy Jackson and the Olympian
The Heroes of Olympus
The Sword of Summer
The Last Olympian, The Lightning Thief
Percy Jackson & The Olympians
Percy Jackson and the Olympians.
Percy Jackson and the Olympians
The Godfather
The Lightning Thief.
The Phoenix Requiem
The Kane Chronicles
The Lightning Thief
The Son of Neptune
The Godfather Part III
The Gods of Asgard
The Last Olympian
The Hidden Oracle
The Sorcerer's Sword
Percy Jackson
The Titan's Curse
Percy Jackson and the Olympian
The Heroes of Olympus
The Godfather
Percy Jackson and the Olympians.
Percy Jackson & the Olympians
Percy Jackson and the Olympian Prince
The Lightning Thief.
The Kane Chronicles
Percy Jackson and the Olympians
The Lightning Thief
The Godfather Part III
The Hidden Oracle
The Sword of Summer
Percy Jackson and the Olympians?
Percy Jackson
Percy Jackson and the Olympian Gods
The Lightning Thief, Percy Jackson
The Sorcerer’s Apprentice
The Titan's Curse.
The Gods of Asgard
The Last Olympian
The Lightning Thief & The Dark Tower
The Order of the Phoenix
The Last Olympian, Percy Jackson
The Titan's Curse
Percy Jackson and the Olympian
The Godfather
The Legend of Hercules
Percy Jackson and the Olympians.
The Gods of Asgard and The Lost Hero
The Lost Hero
Percy Jackson and the Olympian Prince
The Hidden Oracle
The Lightning Thief
The Godfather Part III