Will Gallows is excited to finally be passing out as a fully qualified sky cavalryman - but it's not long before an old enemy crashes in to spoil the party. Faced with the evil cunning of Imelda, the savage wolfer he fought long before, Will must use every ounce of his courage and ingenuity to find out what she's up to . . . before things go up with a bang.

Illustrated by: Jonny Duddle