Sea of Monsters, The (Percy Jackson and the Olympians, Book 2)

Harry Potter and the Chamber of Secrets (Harry Potter, Book 2)

J.K. Rowling

amazon.com
Cover of Harry Potter and the Chamber of Secrets (Harry Potter, Book 2)

The Flame of Olympus (Pegasus Book 1)

Kate O'Hearn

amazon.com
Cover of The Flame of Olympus (Pegasus Book 1)

The House of Hades (Heroes of Olympus Book 4) (Heroes Of Olympus Series)

Rick Riordan

amazon.com
Cover of The House of Hades (Heroes of Olympus Book 4) (Heroes Of Olympus Series)