Sea Horses Books 1 & 2

High Tide: Sadie and her cousin Laura are whisked into a magical underwater adventure when they spot Laura's runaway horse swimming in the bay. But when a sea horse filly is in trouble, can they rescue her? Rising Waters: Katy Dawson is enjoying her vacation to California--until she befriends two girls. They seem to have a big secret, and Katy is determined to find out what it is. But when her plans go wrong, it's up to Katy to save three worlds.