Book excerpt: Harry the Wonder Cat has been around since the beginning of time, and has been helping the Johnson family through life's ups and downs for centuries. Harry is no ordinary cat--and the Johnsons are no ordinary family. Nikki Johnson and her friend Heather have been planning a quiet, relaxing Christmas holiday with Nikki's beloved Aunt Lynn in the sleepy town of Harrot Reef. But Aunt Lynn summons them early--something is terribly wrong! Nikki and Heather rush to Harrot Reef, to discover Aunt Lynn's crumpled body on the floor of the library, with Harry howling next to her. The only clues are a teacup, a copy of Agatha Christie's The Mysterious Affair at Styles, and a note on the mantel. This Christmas visit is going to be anything but relaxing.... As the two friends investigate, the townspeople reveal that according to legend, Nikki's ancestor, crazy Frank Johnson, owned a rare, priceless pink diamond. But did he...really? And what does the legend have to do with Aunt Lynn? With the help of Harry the Wonder Cat's magical powers, Nikki and Heather set out to discover the truth about The Legend of the Pink Diamond.