Nancy, Bess, and George’s Jiu-Jitsu lessons turn into a takedown of another sort in the twenty-first book in the Nancy Drew Diaries, a fresh approach to a classic series. After a close call, Mr. Drew insists that if Nancy’s going to be an amateur detective, she needs to be able to defend herself. So Nancy, Bess, and George decide to check out a Jiu-Jitsu class at Iron Dragon MMA. The technique is hard, but before she knows it, Nancy’s having a lot of fun. And then, just as class ends, the students are shaken by a disturbing sight—someone’s left a dead rat on the front desk and spray-painted “traitor” on the wall. With a big competition coming up soon, is a rival academy trying to stir up trouble to throw the Iron Dragon team off their game? Nancy agrees to help the team get to the truth, but as her investigation takes some unexpected and increasingly dangerous turns, has River Heights’s finest sleuth been outmatched?

Nancy and her boyfriend Ned visit Coffin Hall to research the library's rumored ghost, but when a fire breaks out and Ned is blamed, it is up to Nancy to find the true culprit.

Nancy and her boyfriend Ned visit Coffin Hall to research the library's rumored ghost, but when a fire breaks out and Ned is blamed, it is up to Nancy to find the true culprit.

Nancy investigates the disappearance of the bride while attending the wedding of her friends Bess and George's cousin Veronica's wedding to the owner of local extreme sports complex in Las Vegas.

Nancy investigates the disappearance of the bride while attending the wedding of her friends Bess and George's cousin Veronica's wedding to the owner of local extreme sports complex in Las Vegas.

Nancy and her friends must whip up a way to find the thief involved in a delicious baking case in the seventeenth book in the interactive Nancy Drew Clue Book mystery series.