“Some dolphin luck would be very useful,” said Beany. It’s a wet, cold, and miserable Christmas. Mrs. Robinson is ill and so is Old Blanket, the Robinsons’ beloved dog. Following the doctor’s orders, Mr. Robinson takes Mrs. Robinson off to recuperate in a warmer climate, leaving Beany and Sun Dance, their two younger children, in the capable care of Mrs. Brogan, who with her son, Robin, lives in the other half of Porridge Hall, an old seaside mansion. The twins, Ant and Perry, are shipped off to Great Aunt Mabel. To Beany and Sun Dance, it seems as though things can’t get any worse. Sun Dance settles down to capture any burglar who may attempt to rob their house, and Beany determines to find an ancient sword, with a hilt in the shape of a dolphin, that is supposed to bring luck and grant wishes. Meanwhile, Ant and Perry find their old aunt not quite what they expected. She eats porridge and nothing else and lives with two large dogs, four cats, and a parrot. Before the Robinson family is reunited, each one of them has had extraordinary, sometimes scary, frequently harrowing adventures that make for touching, often hilarious, utterly absorbing reading. This companion to Hilary McKay’s earlier Dog Friday and The Amber Cat, with its rich characterization and great originality, is an outstanding achievement.