The Cascadian Mission is the final book of the Whitehorse Chronicles set in the depths of the Great Decline (2314 C.E.). Two centuries of inappropriate responses to climate change has divided North America into several regions. Two of these regions, the Confederacy and Cascadia, are beset with problems: decline, sectarian governments, distorted distribution of wealth and vast settlements of climate change refugees.

For websiteThe Valley government (now the Yukon) enlists Amy Brown, Cap Ironshank and Joe Otter, a young military student, to accompany Leon James, the chief envoy, to San Francisco on a mission to discuss boundary and trade issues with the Cascadians. The mission is shipwrecked near Prince Rupert and Amy is separated from the main party. As she attempts to re-join her friends, she is involved in some fascinating encounters and meets a colourful cast of characters. Meanwhile, on the way to San Francisco, a mysterious woman representing a revolutionary faction within Cascadia approaches Cap with a signifcant proposal. The complications of this meeting and subsequent Confederate-Cascadian intrigue put the delegation in danger. Cap must find Amy and then carry vital information that is crucial to the Valley survival back to Whitehorse.