When their ghost dog Thatch becomes so interested in a library book about castles that he "smooshes" into the book, ghost twins Robbie and Beka must journey int

The Baby-sitters have always wanted to be sophisticated New Yorkers like Stacey. Well, now here's their chance: Stacey has invited them all to the city for a va

When the Mystery Machine gets a flat tire, the only place to stop is a creepy old castle. The man who owns the castle is having a dinner party and invites the g

When their ghost-dog Thatch becomes so interested in a library book about castles that he "smooshes" into the book, ghost twins Robbie and Beka must journey int

The #1 bestselling chapter book series of all time celebrates 25 years with new covers and a new, easy-to-use numbering system! Jack and Annie are summoned once