3 secret missions.
Free.
Three bonus missions from The Math Detective Agency that you won't find in any of the books — printable PDF, solved with a pencil and a curious brain.
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What's inside the pack
The Mind Reader
A number trick that predicts your answer before you pick it. Your child figures out how it works, then tries it on the family. That first "wait… how?!" moment is the whole point.
The Backwards Letter
A secret message written in mirror code. Crack it, then write your own messages that nobody else can read.
The One-Sided Trap
A strip of paper with only one side. Twist it, cut it, and watch it do the impossible. Story, challenge and answer key, written in the same style as the books, so you know before you buy.
Quick questions
What age is this for?
Ages 9–12 is the sweet spot. Confident 8-year-olds enjoy it with a little help; many 13-year-olds still love the codes and tricks.
Do I need to print anything?
The pack is a print-ready PDF. Print it at home, or let your child solve it on a tablet with a notebook on the side.
Is this a school curriculum?
No — and that's on purpose. These are enrichment missions: the clever, pattern-based math that schools skip. It works alongside any curriculum, including homeschool.
Do I have to sign up to get the missions?
No. Signing up is the quickest way — the PDF comes straight to your inbox and you'll hear about new books first. But if you'd rather not, there's a direct download link right under the form. The missions are yours either way.
What happens after I sign up?
You get the PDF, plus an occasional note when a new book launches — including Book 2, Field Training. No daily emails, and you can unsubscribe with one click.