Suzanne Selfors: The Lonely Lake Monster: Book 2 (Imaginary Veterinary)

Pearl Petal and Ben Silverstein can't wait for their first official day as apprentices to Dr Woo, veterinarian for imaginary creatures. That is, until they are tasked with clipping the bigfoot's big toenails. Gross! Then Pearl spots a lake monster in the water behind the hospital. Even though they've been told not to leave the building for any reason, Pearl and Ben set off for a closer look. But when Ben is captured by the creature and held hostage in the middle of the lake, it's up to Pearl to hatch a rescue mission. Will she save the day, or cement her reputation as town troublemaker?