Lost in a River of Grass is in the tradition of survival stories like Hatchet or On My Side of the Mountain, where the young protagonist finds herself as she struggles to survive in an unforgiving wilderness. In this case, the setting is the Everglades, and Sarah, the 13-year-old narrator, sneaks away from an overnight school field trip for what was supposed to be a quick airboat ride with Andy, a boy who lives in the preserve. Naturally, disaster strikes and they're forced to walk out of the Everglades (they've got a knife, a small amount of Gatorade and some suspicious Spam). The author also skillfully layers in a story about overcoming prejudice. Sarah is black and Andy is the son of a Confederate-flag waving self-described redneck.
When two Florida teenagers become stranded on a tiny island in the Everglades, they attempt to walk ten miles through swampland to reach civilization.