Percy Jackson books 1-4 by Rick Riordan hardcover first edition copies in very good/good condition. The Lightning Thief is first edition 9th print, the Sea of Monsters is first edition 9th print, the Titan’s Curse is first edition 9th print, and the Battle of the Labyrinth is first edition first print. TTC is an ex-library copy. Flaws are as shown in photos. BOTL has someone’s name written across the bottom.