Book 1

The Hostage Prince

by Jane Yolen and Adam Stemple

Published 13 June 2013
Terrifying monsters, daring escapes and a kingdom on the verge of war…   

Unlikely companions Snail and Prince Aspen find themselves thrown together on the adventure of a lifetime. Due to a series of misunderstandings, they end up on the run, having adventure after mishap after scary, thrilling escape. When they reach Aspen's kingdom, they learn to their horror that their actions have divided the country and plunged it into violence. Every minute counts: it is time for Snail and Aspen to figure out a way to stop the building war—together.  


The Hostage Prince is a fast-paced, funny, exciting fantasy novel for young readers. And who better to start tweens on their journey than Jane Yolen (“America's Hans Christian Andersen”—Time) and her son, Adam Stemple!

Book 2

The Last Changeling

by Jane Yolen and Adam Stemple

Published 28 November 2014
"When Prince Aspen and Snail, the midwife's apprentice, realize that they have started the war they meant to prevent, they take on new identities and go on a quest to make things right"--

When Prince Aspen and Snail, the midwife's apprentice, realize they have started the war they meant to prevent, they take on new identities and go on a quest to make things right. The coauthor is Adam Stemple. Book #2

Book 3

The Seelie King's War

by Jane Yolen and Adam Stemple

Published 1 November 2016
"Aspen (the hostage prince) and Snail (the midwife's apprentice) must gather an army to face the Unseelie forces that want to destroy Aspen's home country"--