Silence and Ruptured waters - J M Stephen - Bog

So far Pippa Gardiner has lost her mother in a fire, fallen in love with a Pan from another reality, the Fairy world, discovered her father was a former Pan, developed a close friendship with a satyr, and discovered she has a half-brother who just happens to the Prince of the Fairies. And that's all been within the last year. Now that her brother seems determined to release the apocalyptic creature known as Ruinae, Pippa has to brace herself for even more shocking revelations as she tries to save both of her worlds from the Ruinae's followers. Most notably, the Squalus, a malevolent being who uses the oceans to wreak havoc.