Ho, here it is! The Dragon Defenders - Book Three: An Unfamiliar Place. I know it has taken a while, and you've waited so patiently, so I hope you like it as much as I do!
You can see Briar, the awesome 11-year-old niece of The Pitbull, on the back of Elton. You can also tell from the cover and the title that the brothers have had to leave the safety of their paradise island, and you can probably guess who forced them to leave!