Danger at the Iron Dragon:

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?

A Capitol Crime:

Nancy, Bess, and George look for Nancy's missing father in the twenty-second book in the Nancy Drew Diaries series, a fresh approach to a classic series.

While Nancy's dad is away at a conference in Washington, DC, she invites Bess and George over for a slumber party. The girls are having a great time until Nancy gets a call from a number she doesn't recognize. Her dad never showed up for his panel and he isn't in his room. No one's seen him since the night before, and he isn't answering his phone.

Worried, Nancy and the gang hop the next flight to DC to investigate. The girls scour the hotel for clues with little luck until Nancy finds her dad's cell phone in the hotel basement. She's pretty sure he left her a message on the home screen, if only she could figure out what it means.

The hunt takes them across the US capital, retracing Mr. Drew's steps to figure out what went wrong or who might be out to do him harm. If they don't solve this mystery, it may cost Mr. Drew his life.