In this inaugural title of a middle-grade comics series, siblings Lily and Henry encounter a mysterious cryptid known to many as Bigfoot, who is strangely interested in football and has recently been frequenting their schools' locker rooms. There have been rumors going around the halls of Thomas Edison Grade School of sightings of a strange creature in the boys locker room. However, Lily doesn't buy it; she works for the school newspaper and believes in facts. But after hearing of so many encounters, she decides it might be worth investigating. After interviewing a teacher who saw the creature with his own eyes, Lily decides to form a club with her brother and fellow-student Oliver, dedicated to cryptozoology, the study of cryptid creatures like the one visiting their school. Mack's comical, goggle-eyed figures have outsize emotions, and the frequent sight gags keep the tone cheery and light. A joke-filled monster story about being open-minded while examining the facts, The Cryptid Club checks all the right boxes.