Browse Top Lists Blog Fern Picks About

Loading...

Firefly & Fern

The right book changes everything.

Independent book recommendations for young readers ages 0-18.

Discover

Browse
Fern Book Finder
Top Lists
New Arrivals
Age Groups

Resources

Blog
Age Guide
Newsletter

Company

About
Contact
Privacy
Terms

2026 Firefly & Fern. All rights reserved.

Firefly & Fern is an independent platform. We are not affiliated with any publisher. We use affiliate links — when you buy through our links, we may earn a small commission at no extra cost to you.

Theme

mystery and investigation

Books about mystery and investigation for readers of all ages.

Cover of Gilda Joyce, psychic investigator

Gilda Joyce, psychic investigator

Jennifer Allison

Ages 10–14mystery and investigationfamily secrets

Cover of These Shallow Graves

These Shallow Graves

Jennifer Donnelly, Kim Bubbs

Ages 14–18mystery and investigationclass and social inequality

Cover of River Eyes (Hodder Story Books)

River Eyes (Hodder Story Books)

Joan Lingard

Ages 8–12family bondsmystery and investigation

Cover of The arc of the swallow

The arc of the swallow

Sissel-Jo Gazan

Ages 15–18mystery and investigationethics in science

Cover of Wolf Stalker

Wolf Stalker

Alane Ferguson, Gloria Skurzynski

Ages 9–14wildlife conservationmystery and investigation

Cover of Don't Go Near Mrs Tallie

Don't Go Near Mrs Tallie

Peg Kehret

Ages 8–12mystery and investigationfriendship

Cover of The Case of the Most Ancient Bone

The Case of the Most Ancient Bone

John R. Erickson

Ages 8–12mystery and investigationfriendship

Cover of The legend of Deadman's Mine

The legend of Deadman's Mine

Joan Lowery Nixon

Ages 8–12mystery and investigationadventure

Cover of The mystery of the dinosaur discovery

The mystery of the dinosaur discovery

Helen Moss

Ages 8–12mystery and investigationdinosaurs and paleontology

Cover of Annette Sierra Summer

Annette Sierra Summer

Doris Schroeder

Ages 8–12mystery and investigationdiscovery

Cover of The Explosionist

The Explosionist

Jenny Davidson

Ages 13–18intelligence and scientific discoverycourage and bravery

Cover of King Dork

King Dork

Frank Portman

Ages 13–18mystery and investigationfather and son

Cover of A Dark Inheritance

A Dark Inheritance

Chris D'Lacey

Ages 10–14family secretsmystery and investigation

Cover of The angel of death

The angel of death

Alane Ferguson

Ages 12–16mystery and investigationforensic science

Cover of The dolphins of Laurentum

The dolphins of Laurentum

Caroline Lawrence

Ages 8–12mystery and investigationadventure

Cover of The mystery of the mother wolf

The mystery of the mother wolf

Carolyn Keene

Ages 8–12mystery and investigationwildlife and nature

Cover of The case of the mystery meat loaf

The case of the mystery meat loaf

David Lewman

Ages 8–12mystery and investigationteamwork

Cover of The mystery of the yellow hands

The mystery of the yellow hands

Jake Thoene, Luke Thoene

Ages 9–13mystery and investigationproblem-solving

Cover of All In

All In

Jennifer Lynn Barnes

Ages 13–18mystery and investigationteamwork

Cover of Shadows in the water

Shadows in the water

Kathryn Lasky

Ages 10–14environmental protectiontwins and family bonds

Cover of Far From You

Far From You

Tess Sharpe

Ages 14–18mystery and investigationidentity and self-acceptance

Cover of Big game

Big game

Stuart Gibbs

Ages 9–14mystery and investigationwildlife conservation

Cover of Crusher

Crusher

Niall Leonard

Ages 12–16family secretsmystery and investigation

Cover of Water-Ski Wipeout

Water-Ski Wipeout

Franklin W. Dixon, Matt David

Ages 8–12mystery and investigationbrotherhood