*Some of my details might be wrong. It's been a while.*
Brother and sister, after their parents went missing after a plane crash, go to live with their Uncle Wolfe. He has his own private island, appears filthy rich, and is a cryptid hunter. Grace and Marty get swept up in his travels to find such elusive creatures and run into......Wolfe's nemesis, Noah Blackwood. Okay, predictable elements, the dialogue could be better, and some cliches. This probably wouldn't bother a 9-10 year old which is the age range this book is geared toward but, most likely, anyone else older it would. That being said: character development, interaction, plot, story, pacing, excitement, danger, etc, it's all there. It is well done just has a few snags.