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Margaret Peterson Haddix
Books Into the Gauntlet
Series written in The 39 Clues
Branch Ekat

Margaret Peterson Haddix is the author of popular series such as The Shadow Children and The Missing series. She has written over thirty books, and the first book she ever published is Running Out of Time. She lives with her husband and two children in Columbus, Ohio.

Regarding The 39 Clues, she has only written Into the Gauntlet, book ten of the Clue Hunt. She is an Ekaterina.

Into The Gauntlet

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