To get it out of the tub, they put it in a goldfish pond. Soon, though, it grows too large, and the pond is in danger of freezing, so they move it to a nearby lochan. But as he continues to grow at an alarming rate they face another problem -- how to keep the friendly beast, who associates humans with food and companionship, hidden. And where can they take him next?

Dick King-Smith's specialty is gentle, fairly easy-to-read animal stories, and this one, though it's about a mythical creature, follows his tried-and-true formula. Though it lacks most of the elements most authors seem to think are necessary -- a villain, suspense, breathtaking drama, potty humor, nasty or heroic kids, ineffectual adults -- it's as pleasurable and satisfying in its calm, reassuring way as a cold evening in front of a warm fire.

There's something so reassuring about a writer who can make a story this delightful and fun without all the bells and whistles. Just a little light humor, likable characters, an engrossing setup, a little authorial magic, and presto -- a satisfying read.