Nina and the Keeper of the Keystone

Secret Society of Rebel Girls

Illustrated by Kristina Kister
Ebook
On sale Oct 14, 2025 | 256 Pages | 9798217137879

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In book two, Nina and her friends realize they can use the magical mailbox to help their fellow students deal with their problems. Soon there’s a stream of kids looking for advice.

Not wanting to divulge their secret to other students, they say that they merely draw on history to give their advice. But when a student takes the advice from a letter Marie Curie sent a little too literally, almost blowing up the science wing, their operation is forced underground. What's worse, a new principal arrives on a mission to improve standards, and he seems to know a little more about Ada Lovelace Middle School than he's letting on . . .
Rebel Girls is a global, multi-platform entertainment brand, dedicated to inspiring and instilling confidence in a generation of girls around the world. Rebel Girls started from a 2016 international bestselling children's book, featuring real-life, extraordinary women throughout history, geography and field of excellence, focusing on creators, innovators, leaders and champions. Its community of self-identified Rebel Girls spans more than 100 countries, with six million books sold in 51 languages and 13 million podcast downloads. View titles by Rebel Girls

About

In book two, Nina and her friends realize they can use the magical mailbox to help their fellow students deal with their problems. Soon there’s a stream of kids looking for advice.

Not wanting to divulge their secret to other students, they say that they merely draw on history to give their advice. But when a student takes the advice from a letter Marie Curie sent a little too literally, almost blowing up the science wing, their operation is forced underground. What's worse, a new principal arrives on a mission to improve standards, and he seems to know a little more about Ada Lovelace Middle School than he's letting on . . .

Author

Rebel Girls is a global, multi-platform entertainment brand, dedicated to inspiring and instilling confidence in a generation of girls around the world. Rebel Girls started from a 2016 international bestselling children's book, featuring real-life, extraordinary women throughout history, geography and field of excellence, focusing on creators, innovators, leaders and champions. Its community of self-identified Rebel Girls spans more than 100 countries, with six million books sold in 51 languages and 13 million podcast downloads. View titles by Rebel Girls

Books for Asian American, Native Hawaiian, and Pacific Islander Heritage Month

Every May we celebrate the rich history and culture of Asian Americans, Native Hawaiians, and Pacific Islanders. Browse a curated selection of fiction and nonfiction books by AANHPI creators that we think your students will love. Find our full collection of titles for Higher Education here.

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