Join the Super Perceptive Undercover Detectives, SPUD, on their jump-started detective pursuit. Adapting to life with hearing aids can be daunting; particularly when wearing them to school. When Callie discovers her new hearing aids - 'the Slugs' - offer her the exclusive capability to communicate with Bo the Mynah bird, her apprehensions start to ease. But having a pair of watching eyes in the sky could be of use... The trio team up with Callie's closest friend, Grace, as they attempt to apprehend a criminal causing chaos throughout the city. Engage in swift chases, a very hungry bird and purple POO! A unique mystery series illustrated by Louise Forshaw, perfect for reluctant readers.