Diana James just published Shared Walls: Seattle Apartment Buildings, 1900-1939, a history of apartment dwelling in Seattle during the years listed in the title.
This is (an as yet unseen) welcome addition to the house history field as it expands on the regular house history field of research.
Two articles in the Seattle Times give you more of a preview than I can. Here they are:
A “Now and Then” installment which mentions Shared Walls.
Only 2,000 copies have been printed, according to one of the pieces, and I’m sure they’ll go fast. Shared Walls is available at Amazon.com.