Flush is a young adult novel by Carl Hiaasen first published in 2005, and set in Hiaasen's native Florida. It is his second young adult novel, after Hoot. The plot is similar to that of Hoot but it doesn't have the same cast and is not a continuation/sequel. The plot centers around Noah Underwood, a teenage boy whose father enlists his help to catch a repeat environmental offender in the act.