Storm Warning
The 39 Clues
by Mallory Kass

My rating: 4 / 5
Genre: Children’s mystery, adventure

Spoiler notice: The following review will contain some spoilers for the previous books in the series, starting with The Maze of Bones.

After the 39 Clues finale, a new threat has arisen, leading the separate branches of the Cahill family to come together and share their secrets. Broken down into a section for each of the 5 branches, this book covers founders and agents (though I’m not 100% sure what the difference is, since some of the founders are current…how can they be founders 500 years after the branch was founded?), strongholds, and tools and tricks used by each branch. It’s a good follow-up to the series, with some reminders of locations, names, or events that were brought up during the series, as well as new information. The brief vignettes that show some of the major characters from the series after the end of the clue hunt were great to have, and there are even a couple of short stories about historical characters looking for clues or being recruited by Cahills. There are a few things explained in this book that I at first thought must be spoilers of what is technically the final book in the series, though also a launching point for the first spin-off series. That book was published after this one, so I hope that’s not the case, but I won’t know until I read it (Vespers Rising).

The introduction by Rick Riordan, which depicts the different authors from the series as members of the Cahill branch, meeting to discuss sharing their secrets for this book, is clever and enjoyable. Fans of the 39 Clues series will probably find the brief stories and extra information in this book worth reading.

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