Bad Island by Doug TenNapel

I enjoyed this author's Ghostopolis and was looking forward to reading this graphic novel. There are two similar stories being told here. Reese, a teenage boy about to runaway from home, is forced to go boating with his family. When the boat is wrecked on a lonely island full of threatening magical creatures, he must step it up and act like a man instead of a whiny pre-teen.  In the fantastical story, a rock giant teenage boy defies his dad to go off to war on his own, with dismal results. Obviously, the stories are connected eventually. The tales are serious, but the characters provide some funny moments--especially the snarky comments of the parents and the sister's fascination with her dead pet snake.