Invasive species, mysterious creatures, and a high-stakes rescue on Gilded Age Florida's inner waterways bring this stunning trilogy to an explosive conclusion!

Frankie Davenport; her sister, Lulu; and their best friend, Algie Emsworth, are eager for their next adventure. When they see an ad in the local paper for a river cruise and hear rumors of a monster in that very same river, they know that this is just the trip for them.

During an outing, the trio stumble upon a strange creature in distress. Could this be Sabrina, the fabled river monster? When an unidentifiable aquatic corpse is discovered, Professor Champion, Frankie's nemesis, is called in to investigate. Frankie, Lulu, and Algie are at odds with one another over how to save Sabrina, and Frankie must decide if she should keep doing things her way or trust her friends and family to save Sabrina.

Samantha San Miguel's Harmless is an exciting adventure brought to vivid life. This page-turning novel is a thrilling conclusion to the Spineless trilogy that's perfect for fans of Beyond the Bright Sea and Serafina and the Black Cloak.