One of four Meg and Mog adventures based on episodes from the television show—the others include Mog in Charge, Meg's Fancy Dress and Meg's Cauldron—this book follows Meg, Mog and Owl as they spend the day at the seashore. When Meg wonders what it is like underwater, she conjures up a submarine, and she and Mog set out to explore (with wise Owl staying on dry land). Finding a treasure in a sunken ship, witch and cat are ecstatic, until their submarine is attacked by a giant octopus. Does the octopus want the treasure, or something else...?

Having read all of the Meg and Mog picture-books written by Helen Nicoll and illustrated by by Jan Pieńkowski (I have not read any of the subsequent titles authored by David Walser as yet), but never having watched the animated television series based upon them, I approached these TV tie-in titles with some interest. Although unimpressed when reading the first two (Mog in Charge and Meg's Fancy Dress) a number of years ago, I found the third that I read (Meg's Cauldron) more appealing. Similarly, this fourth and final TV tie-in was enjoyable, offering a fun, lighthearted little seaside adventure for our trio of friends. Having now read all four of these titles, I am curious to watch some of the television show, and will have to see whether I can track some episodes down. Recommended to those young readers who are fans of the television show, or who have run out of original Meg and Mog stories to read. ( )