The Deep
by Helen Dunmore | 
The Mermaid Summer
by Mollie Hunter | 
The Tide Knot
by Helen Dunmore | 
Celandine
by Steve Augarde | 
The Leap
by Jonathan Stroud | 
Black Maria
by Diana Wynne Jones | 
The Time of the Ghost
by Diana Wynne Jones | 
Firesong
by William Nicholson | 
Emily Windsnap and the Monster from the Deep
by Liz Kessler | 
Slaves of the Mastery
by William Nicholson | 
The Woven Path
by Robin Jarvis | 
Seaward
by Susan Cooper | 
The Cup of the World
by John Dickinson | 
Elidor
by Alan Garner | 
The Homeward Bounders
by Diana Wynne Jones | 
The Last Olympian
by Rick Riordan | 
Harry Potter and the Chamber of Secrets
by J. K. Rowling | 
The Battle of the Labyrinth
by Rick Riordan | 
The Lightning Thief
by Rick Riordan | 
The Titan's Curse
by Rick Riordan |
Sapphire's father mysteriously vanishes into the waves off the Cornwall coast where her family has always lived. She misses him terribly, and she longs to hear his spellbinding tales about the Mer, who live in the underwater kingdom of Ingo. Perhaps that is why she imagines herself being pulled like a magnet toward the sea. But when her brother, Conor, starts disappearing for hours on end, Sapphy starts to believe she might not be the only one who hears the call of the ocean.
