With my usual lack of attention to detail, it wasn't until I finished reading this compelling tale of survival that I realised it was a true story. Salisbury's cousin was a member of a scout troop that found itself engulfed by a Tsunami while they camped on a deserted beach on the Big Island of Hawaii. In real life, not everyone made it back from the camping trip. You'll have to read it yourself to find out if the same is true in the novel.
Salisbury foreshadows this catastrophic event with the tension that exists between the narrator Dylan, a white middle-class boy, and older Louie, part Hawaiin whose parents have almost forgotten he exists. Dylan had witnessed Louie being beaten up and in his humiliation, Louie turned on Dylan. Louie keeps Dylan nervous with his menacing looks and constant teasing but their mutual dislike becomes irrelevant in the events that follow.