The Baker children can't believe their luck when they find out they are staying at a castle for the weekend. But when they uncover a plot to steal forgotten treasures, Millie, Jamie, Zach and their dog Harvey know they have to act.

Are they smart enough to outwit the thieves? Can they decode the clues in time? Or has their spying put them in too much danger?

Don't miss Spy Danger, the second of the Fearless Four series by Justin Davis. If you like adventure stories, this will have you turning the pages!