Book Series · 3 Books

Agent Moose Books

In order from Agent Moose to Operation Owl.

Agent Moose is an enthusiastic forest detective whose confidence often runs ahead of the clues. Across three full-color graphic novels, he and his observant owl partner, Owlfred, investigate odd disappearances and schemes around Big Forest.

Reviewed by the Bookroo Editors Updated August 13, 2026

Reading order

How to Read the Agent Moose Books

Macmillan lists three books in publication order: Agent Moose, Moose on a Mission, and Operation Owl. Each book presents a complete mystery, but reading in order gives children the best introduction to Moose, Owlfred, and their recurring home in Big Forest.

Sources: Macmillan: Agent Moose series.

For parents

What Parents Should Know

These are fast-moving comedy mysteries told in full-color panels. Readers follow clues, notice what Agent Moose misses, and see how Owlfred's patience and careful observation balance his partner's impulsiveness.

The cases include disappearances, chases, suspicious villains, traps, and slapstick danger. The action is cartoonish rather than graphic, and the mysteries end with the heroes safe and the case explained.

Where the story begins

First Book in the Series

Graphic Nov.

Sale price

$1049

Book #1 · Chapter Book · Ages 6–9 · 2020

Agent Moose

By Mo O'Hara, Jess Bradley (Illustrator)

A moose and an owl team up to solve a mystery involving a missing turtle, a suspicious chameleon, and a pelican with a hidden agenda

128 pages· 4,516 words· Est. 1 hour read

$10.99Save 5%

Hardcover

Summary: Agent Moose, the not-so-great secret agent, and his clever sidekick Owlfred face a puzzling mystery at the South Shore. People are vanishing without a trace, and now a crucial witness has disappeared. As they dive into the case, time is ticking. Can they uncover the truth and find the missing turtle before it's too late? Join this quirky duo on a thrilling adventure filled with unexpected twists and turns.

In reading order