Walk in Shadow is the expected title of the final book in Steven Erikson's Kharkanas Trilogy. In a 2017 interview, Erikson stated there would "be plenty of surprising reveals in [Walk in Shadow], primarily centered on the creation of the three warrens of Dark, Light and Shadow."
In October 2017, Erikson announced that Walk in Shadow would be delayed while he instead worked on the first book of the Witness Trilogy. This decision was made after he became aware of the unexpectedly low sales of the first two books in the prequel series, Forge of Darkness and Fall of Light.
Erikson discusses the process of writing the first chapter of the book in a post on his Facebook page.