The Trumpet of Terror by Deborah Lerme Goodman takes YOU on colossal quest to help the Norse God Odin defeat the evil witch.

Written from the second-person point of view, the reader is the guardian of the Trumpet of Terror-a magical horn that causes enemies to surrender instantly, and must choose what happens next in the story:
If you tell Nills, "Go on without me. I want to find out if that man is really Odin," go on to the next page.
If you answer, "All right, I'm coming," turn to page 10.

You are the youngest passenger rowing a Viking long ship to Iceland. Although you have always dreamed of sailing the seas, on the morning of your departure, you are approached by a one-eyed man with a magical star-covered cloak. Could this actually be Odin, the Norse father of gods? You learn that Odin and all of the gods of Asgard are in danger and desperately need your help. As the guardian of the Trumpet of Terror, a magical horn that causes enemies to surrender instantly, are you the last human left with the cleverness and magical powers needed to save these warring gods? Will you be able to help Odin defeat the evil witch Gullveig?

Middle grade readers will fly with the wings of a falcon, drink from the Well of Wisdom, and navigate stormy seas, all while having fun reading and choosing.