They've turned their California home into a feline fun house. It's the perfect mix of cat-friendly and cat-fantasy. And now cat fans can get an inside look with the first-ever paperback edition of The Cats' House.The house is all cat, and nine of them call it home. Bob Walker shows us the cats' living space, giving us a peek into 140 feet of brightly colored aerial walkways, spiral staircases, giant scratching posts, and playful peepholes.It's cat care combined with interior design.