The Sorceress, The Druid, and The Timewalker

Cythera, a sea pixie, needs help in saving her kinds' island home from sinking and letting loose a horrible beast that would terrorize the seas of the Crystal Realm.
This story takes place right after "The Apprentice, The Swordsman, and The Impossible Mission", and Falina the Sorceress and her friends - Adriel the Druid and Kilian the Timewalker - set out on another great adventure that takes them from the hidden nooks of their world and across the unknown seas; encountering the forgotten past; sea monsters; pirates; mermaids; mysterious spirits; and much more!