After years of being strictly house cats, Marco and Polo escape into the wonderful, but dangerous outside world and are sent on three challenging adventures by a group of cats known as the Club of Mysteries.
"Phyllis Reynolds Naylor (born January 4, 1933) is an American writer best known for children's and young adult fiction. Naylor is best known for her children's-novel quartet Shiloh (a 1992 Newbery Medal winner) and for her "Alice" book series, one of the most frequently challenged books of the last decade."--From Wikipedia