Synopsis: "If you accept the hypothesis repeatedly advanced by eleven year-old Shelly that the vitamin E he feeds Nippy, his baby shark, lets its blood absorb more oxygen and also causes the cells to mutate and produce a lighter-than-air gas, then everything else about this sixth-grade boy and his flying pet is as normal and everyday (but never as funny) as Henry Huggins and his guppies. ..." --KirkusReviews.com (negative, contemporary review)