内容简介：
Can a rock hopper penguin save Smiling Sally's Diner from extortion? Meet Mr. Pin, just arrived from the South Pole, who has a sharp eye for clues, unusual talents, and a strong taste for chocolate. "Lively plotting, staccato, deadpan delivery in whimsical parody of Dashiell Hammett; an economical style and carefully controlled repetition of ideas and phrases . and an engaging hero combine in these three genuinely funny, brief mysteries."-Kirkus An IRA/CBC Children's Choice "Kids will like this penguin detective . and will cheer him on."-ALA Booklist "An inviting, non-threatening, easy chapter book."-School Library Journal