A mystery children can follow
Important details appear before the reveal, letting young detectives test their own theories beside Nina.
Children’s mystery author
Jonia Epp
Creator of Whiskers & Clues and the cozy town where every mystery begins with a clue.
Jonia Epp is the creator of the Whiskers & Clues series featuring Nina, the Cat Detective. Inspired by a love of cozy mysteries, cats, and imaginative storytelling, she writes heartwarming mystery adventures for young readers ages 5–9.
Inside the stories
Made for children who love to notice things
Nina’s mysteries invite young readers to slow down, watch carefully, and follow the trail. The clues matter. The suspense stays gentle. The truth leaves room for kindness.
A cozy place to feel curious
Whiskerville brings suspense without frightening scenes, making the books welcoming for independent reading and family read-alouds.
A gentle truth at the end
Each answer opens a conversation about friendship, honesty, mistakes, community, or making things right.
Books by Jonia Epp
Follow Nina from the first clue
The Whiskers & Clues mysteries are designed to be read in order, with familiar friends and a fresh case in every book.
Book One · Available now
Nina and the Mystery of the Missing Necklace
A treasured necklace disappears overnight. Nina follows the clues through Whiskerville to uncover the truth.
Explore Book One
Book Two · Available now
Nina and the Case of the Vanishing Cupcakes
A festival, a locked bakery, and a tray of cupcakes gone without a trace. Time for Nina to follow her nose.
Explore Book Two
Book Three · Coming soon
Nina and the Mystery of the Mayor’s Medal
A grand ceremony, a missing medal, and Whiskerville’s trickiest case yet.
Preview Book ThreeComing November 18, 2026
The home of Nina’s mysteries
Welcome to Whiskerville
Cobblestone streets, flower-filled gardens, warm bread drifting down the lane, and mysteries hiding in the most ordinary places.
Whiskerville is a town young readers can return to, where familiar faces gather around each new puzzle and careful noticing always matters.
Visit the series pageA few useful answers
About Jonia’s books
What kind of books does Jonia Epp write?
Jonia writes cozy illustrated mysteries starring Nina, the Cat Detective, Emily, and Paris. The stories combine fair clues, gentle suspense, humor, and kindness.
What age are the Whiskers & Clues books for?
The series is written for young readers ages 5–9. Its short chapters work for family read-alouds and children building independent reading confidence.
Where should a new reader begin?
Start with Nina and the Mystery of the Missing Necklace, then continue through the series in reading order.
How can readers hear about new books?
Join the Whiskerville Club for release news, small surprises, and the free printable activity pack.
Letters from Whiskerville
Come back for the next clue
Join the Whiskerville Club for book news, the free activity pack, and notes from the cozy town where Nina’s mysteries begin.