A shapeshifting extraterrestrial cop, Zymel, enlists the aid of shrimpy seventh-grader Frank Dunn and his friend Lauren to repair his flying saucer and recapture Fek, an escaped shape-changing prisoner. As they change in rapid succession, Frank and Lauren find themselves mixed up with a ram, a dog, a watermelon, a bottle of aspirin, and a bicycle. In an exciting ending, Frank, Lauren, and Zymel finally nab the evil Fek. "Moves rapidly to a surprising and definitely satisfying conclusion."--SLJ. "Funny scenes abound in this fast-paced, enthralling adventure."--H. "This story should be a hit."--BL.