Reluctant Voyagers — Elisabeth Vonarburg

Witnessing strange and unexplainable changes in her once-familiar Montreal home, Catherine Rhymer fears for her sanity until the arrest of two students puts her on the trail of a secret revolutionary movement. Now Catherine must embark on a voyage of discovery, travelling north in search of the truth about her world. She will journey through hail and snow and herds of grazing beasts to a confrontation with the originators of her reality. Enter a new world on the edge of sanity from Elisabeth Vonarburg, the Grand Dame of Canadian SF.