The fourth book in the Mysteryville series is Tea Party Joe. Thirteen year old Ashley finds herself with her friends, Jacy and Dylan on another time traveling adventure. They get clues from an unlikely source that will not leave them alone. The clues point to the Boston Tea Party in the year 1773 revolving around a boy named Joseph. With no other clues or ideas, can they figure it out? Can they keep themselves safe from harm while trying to save Joseph? There is no time to waste!