Samantha San Miguel

"When his asthma lands him at a health resort in the wilds of Gilded Age South Florida, twelve-year-old Algie Emsworth is over the moon. The scientific treasure trove of unexplored swamps may launch his dream career as a naturalist. But even Algie is startled when he happens upon a brand-new species and her brood in the karst springs surrounding the resort. Algie quickly realizes he must keep his discovery a secret: a famous collector of exotic animals...

Frankie, Lulu, and Algie embark on a river cruise where they encounter a mysterious creature, possibly the fabled river monster, Sabrina, and must decide whether to save it together or go their separate ways, all while facing challenges from their nemesis, Professor Champion.