Mary–Kate and Ashley pretend to be older so they can get invited to a Weekend Party. But is hanging out with an older group of kids worth living so many lies? The series that began as a trilogy celebrating Mary–Kate & Ashley's 16th birthday is now a staple in tween and teen girls' libraries. Because Mary–Kate and Ashley remain forever 16 in these books, aspiring younger readers get to anticipate and experience this magical time of life again and again.