Ingo (Ingo #1)

Sapphire's father disappears into the sea, leaving her with only his enchanting tales of the Merfolk kingdom, Ingo. When her brother, Conor, also begins to vanish for long stretches, Sapphire suspects he too hears the ocean's call. She finds herself drawn to the water, wondering if the mythical world her father spoke of is real and if it holds the key to their family's mystery.