Book One
Nina and the Mystery of the Missing Necklace
A treasured sapphire necklace disappears overnight, leaving an open window and an empty velvet box. Nina is on the case.
Explore Book OneA cozy mystery series for ages 5–9
Whiskers & Clues Nina, the Cat Detective
Whiskers & Clues: Nina, the Cat Detective is an illustrated cozy mystery series by Jonia Epp for children ages five to nine. Every book presents a gentle, self-contained mystery with fair clues young readers can solve alongside Nina.
Read them in order
Three gentle mysteries with fair clues, short chapters, and pictures throughout.
Begin with the missing necklace, follow Nina into the locked bakery, then join her inside locked Town Hall for the Mayor’s missing medal.
Book Two
Nina and the Case of the Vanishing Cupcakes
The festival cupcakes vanish from a locked bakery on the biggest morning of spring. Time for Nina to follow her nose.
Explore Book TwoBook Three
Nina and the Mystery of the Mayor’s Medal
Days before Founders’ Day, the Mayor’s Medal vanishes from locked Town Hall. Nothing is broken, and nothing else is missing.
Preview Book ThreeComing November 18, 2026
Story-inspired coloring book · Ages 5+
Color Nina’s First Mystery
Follow the missing-necklace case through 48 coloring pages filled with familiar characters, cozy village locations, and clues to discover. The paperback is available now; the hardcover is coming soon.
Explore the coloring bookNina’s first mystery in more languages
International editions
Follow the missing necklace in Spanish, German, or Portuguese. Each edition is available as an ebook and paperback.
Español
Deutsch
PortuguêsFor children ages 5–9 who love solving clues
Gentle mysteries children can solve alongside Nina
Fair clues
The important details appear before the reveal, giving children a real chance to solve each case with Nina.
Cozy, not scary
Each puzzle creates curiosity and gentle suspense without frightening scenes or a heavy mood.
Short chapters
Manageable chapters support growing readers and make family read-aloud time easy to pause and resume.
Kindness at the heart
The answers lead to honest conversations about friendship, community, mistakes, and making things right.
Whiskerville’s finest
Meet the detectives
Nina
The Cat Detective
A gray-and-white cat with bright green eyes and a nose for trouble. Nina notices the small, quiet things everyone else walks right past.
Emily
Town Librarian & Best Friend
Emily keeps her notebook close and her yellow pencil ready, recording every clue Nina finds along the way.
Paris
The Bouncy Helper
A round little tortoiseshell kitten with endless energy, plenty of theories, and no intention of missing the excitement.
Welcome to
Whiskerville
A cozy town of cobblestone streets and flower-filled gardens, where the warm smell of fresh bread drifts down the lane and a robin sings on the edge of the fountain.
It looks like an ordinary, quiet place. But mysteries have a way of turning up when you least expect them, and every single one begins with a clue.
Explore the Whiskerville ClubFrom families and storytime readers
Why readers return to Nina’s mysteries
★★★★★“I read this book to my 6 and 5 year old boys. They absolutely loved it and didn’t want me to stop reading it. It kept everyone’s attention all the way through the book.”
★★★★★“An excellent mystery adventure for children. As a librarian, I have added the entire series to our storytime, much to the children’s delight.”
★★★★★“This is a simple, evenly paced story and like every good detective tale, it follows a trail of little clues that ultimately solve the mystery. It also highlights the importance of kindness and honesty.”
Free for young detectives
The Whiskerville activity pack
Every Club member receives a printable activity pack with crosswords, mazes, spot-the-difference puzzles, and coloring pages inspired by Nina’s cases.
Crosswords
Whiskerville-themed puzzles that turn new vocabulary into a game.
A-maze-ing mazes
Help Nina follow the trail from the first clue to the big reveal.
Spot the difference
Train those detective eyes on cozy scenes from the books.
Coloring pages
Bring Nina, Emily, and Paris to life in your own colors.
Get the free activity pack
Join the Whiskerville Club. Free, unsubscribe any time.
Letters from Whiskerville
Be ready when the next clue appears
Join the Whiskerville Club for monthly Letters from Whiskerville, book news, printable activities, and occasional surprises from Nina’s cozy town.