New Adventures of Mary-Kate & Ashley #21: The Case of the Flapper 'Napper: The Case of the Flapper 'Napper - Couverture souple

Mary-Kate & Ashley books launched in 1990, and today the various book series continue to grow to reflect the ever-evolving lifestyles of kids, 'tweens, and teens. HarperEntertainment and Parachute Publishing release twenty-five books a year and have sold more than 30 million copies. Mary-Kate and Ashley's two book series Two of a Kind and The New Adventures of Mary Kate and Ashley are frequent USA Today bestsellers. And Mary-Kate & Ashleynovelties, such as Wall Calendars, a Mood Diary, a Be My Valentinecard-making kit, and the movie tie-in series, Starring-In continue to be hugely popular.

The growth of the Mary-Kate & Ashley brand has afforded Parachute and Harper the opportunity to work with companies such as Acclaim Entertainment, Mattel Inc., Warner Home Video, Kid Rhino, Lightyear Entertainment, Sail with the Stars on cross-promotional and cross-merchandise projects, including a very special, book-dedicated area on mary-kateandashley.com -- Now Read This!

Talk about style! Ashley and I were invited to a cool costume party at the house of a famous mystery writer, Fiona O'Leary. We couldn't wait to hit the ballroom for the big 1920s dance contest.

The whole flap started when Fiona's adored cat disappeared. And everyone thought our dog Clue "dunnit"! Ashley and I were sure our pooch was framed. But we'd have to prove it -- or Olsen and Olsen could end up Clue-less!