Solve the code.
Crack the case.
Save the day.
The Math Detective Agency turns math practice into secret missions. Kids ages 9–12 join the Cipher Agency, crack patterns and number systems, and discover math tricks so clever most adults have never seen them.
- Every challenge starts out "impossible" — then becomes surprisingly easy
- From binary numbers to Fibonacci sequences — real math, disguised as spy work
- No worksheets, no drills — a story your child wants to finish
- Perfect for ages 9–12 — at home, homeschool, or road trips
20 Secret Missions
The book that starts it all. A new recruit joins the Cipher Agency and learns to see the patterns other people miss — binary codes, Fibonacci sequences and number tricks most adults have never seen.
- 20 secret missions — each one a complete story with a real math trick inside
- Every challenge looks impossible — then turns out surprisingly easy
- Try it first — three free bonus missions, not taken from the books
NEW · CHRISTMAS 2026
Operation North Pole
Santa is missing, and one of his six most trusted helpers is an impostor. One math mission a day from December 1st. Every solved mission opens a window of the elves' Advent Calendar, and every window hides a clue.
- 24 advent missions + a Christmas Eve final case — 15–25 minutes a day
- A real logic-grid mystery — cross off suspects until one is left
- Screen-free advent calendar — the countdown runs on thinking, not chocolate
COMING SOON
Field Training
The recruit becomes a Field Agent. Book 2 sends agents outdoors for 25 field operations — measuring terrain, decoding nature patterns, charting stars and running camping missions.
Every mission earns grid coordinates, and the completed grid reveals a symbol no one at the Agency expected. The math hiding outside your door.
STATUS: CLASSIFIED — COMING SOON
Meet the Agency
Not everyone can see patterns. That's why the Cipher Agency needs recruits — and why these three will guide your child through every mission.
Professor Zero
Brilliant. Eccentric. Sees patterns others can't even imagine.
- SPECIALTYPattern recognition
- LOVESPi, puzzles & coffee
- MOTTO"Every pattern has a purpose."
Sigma-7
Small in size. Huge in computing power.
- SPECIALTYInstant calculation
- LOVESBinary, spare parts & loyalty
- MOTTO"The trick is always in the numbers."
Agent Delta
Sharp. Fearless. Always ready. Never backs down.
- SPECIALTYField operations
- LOVESCodes, maps & a good challenge
- MOTTO"Trust the pattern. Never give up."
Get 3 secret missions free
See exactly how the Agency works before you buy. Three bonus missions you won't find in the books, ready to print — your child can start cracking codes in the next ten minutes.
Send me the missions