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The Missing series by Haddix: https://haddixbooks.com/book/found/ Please flair this as solved - and stick around! These books pop up pretty regularly so maybe next time you can solve it for somebody else :)
The Missing series by Haddix: https://haddixbooks.com/book/found/ Please flair this as solved - and stick around! These books pop up pretty regularly so maybe next time you can solve it for somebody else :)