Every detective needs the case files. New books, free activities & first dibs on every release.

Ava & Carol Detective Agency
Middle-Grade Mystery Β· Ages 8–12

Two best friends. One detective agency.

Fast-paced whodunits packed with real forensic science, secret passages, and best-friend adventure β€” for readers who can't put a mystery down.

Get free sample chapters Shop the series

Perfect for fans of Nancy Drew, Enola Holmes & Encyclopedia Brown Β· 13 books & counting

Signed by the authoronly here β€” never on Amazon
✍️ Signed copies & bookplates πŸ“¦ Ships direct to you πŸ‘“ Dyslexia-friendly editions ⭐ Loved by parents & teachers
The Series

A mystery series that turns kids into readers

Ava and Carol are twelve-year-old best friends who can't resist a mystery. Across thirteen adventures they've chased diamond smugglers, explored haunted mansions, and outwitted jungle poachers β€” cracking every case with real detective skills like fingerprinting, footprint casting, and code-breaking.

Written for ages 8–12 and built to keep even reluctant readers turning pages, with short, fast chapters and a dyslexia-friendly edition for readers who need it.

Browse all 13 books

Why kids & parents love it

  • Real forensic science woven into every case
  • Two smart, brave girls as the heroes
  • Short chapters that beat screen time
  • Good role models and real friendship
  • A series to collect β€” 13 books and growing
Start the case

Get free sample chapters

Sign up and we'll email you sample chapters from the series β€” plus exclusive content, contests, and first dibs on every new release. After signing up you'll get a link to download the PDFs.

No spam. Unsubscribe anytime. We never share your email.
FREE
Chapter One

The Scientific Burrito

Ava & Carol Detective Agency Β· Book 1
The Casebook

Thirteen mysteries to solve

Start with Book 1 and collect the whole series. Every book can be signed, personalized, and bundled with swag in the shop.

Shop all books & bundles β†’
The Witness Statements

What readers say

β˜…β˜…β˜…β˜…β˜…

My 10-year-old gave me her newspaper money and asked me to order all the next books in the series!

β€” Kevin H. Β· Verified Amazon review
β˜…β˜…β˜…β˜…β˜…

Clever, funny, and fast paced. I got three books in one! The writing was hilarious β€” these girls' sense of humor made the stories all the more enjoyable.

β€” Dan S. Β· Verified Amazon review
β˜…β˜…β˜…β˜…β˜…

Ava and Carol are better than Encyclopedia Brown! These books would encourage children who don't like reading to give it a try.

β€” Lynne L. Β· Verified Amazon review
β˜…β˜…β˜…β˜…β˜…

Great series! Perfect for adult readers too. The stories are like Scooby-Doo written by John Grisham β€” great dialog and a ton of action.

β€” J. Galt Β· Verified Amazon review
The Detective Agency

More than just books

We didn't just publish a book β€” we built a world. Signed copies, bookplates, stickers, and a newsletter community of young detectives all live here, direct from us.

Buying direct means signed copies you can't get on Amazon, a personal note from the author on request, and your support going straight to the series.

Visit the shop

Why buy direct?

  • Signed copies & bookplates you can't get on Amazon
  • A personal note from the author, on request
  • Dyslexia-friendly & Spanish editions
  • Early access to new releases & contests

Also available on

Amazon, Audible & Apple Books β€” but buying here helps the most, and it's the only place to get it signed.

Ready to start the adventure?

Grab free sample chapters, then shop signed books, bundles, and detective swag β€” all direct from us.

Get free chapters Shop the series