Isle of Sorrows by Shari L. Tapscott

After several setbacks, Soleil, Lukas, Davyn, and the rest of the Greybrow’s team finally arrive at the Isle of Sorrows, and the expedition for the mage’s legendary spell tome commences…
My name is Soleil Eldemyer, and I don’t like pirates. Or giant jellyfish, voltaic dragons, or goblins—all of which we find on the Isle of Sorrows, a melancholy sort of island at the heart of the Cursed Isles.
But I do like Lukas Greybrow. In fact, I like the captain’s brother quite a lot…and certainly more than I should.
Sadly, we have little time to explore the affection growing between us, mostly because everything on this wretched island is trying to kill us. Oh, and there appears to be a traitor in our midst as well. At this rate, we’ll never find the mage’s tome.
But there I go, getting ahead of myself again.
Let’s pick up where we left off…