What I principally enjoyed in this WW II story was the careful namechecking of Seattle and Puget Sound places and sights, including the Kalakala, which was considered an eyeful back in the day too.
The second-best bit was the tale of a young North Dakota lad becoming entranced with heavy industry and forging his way to competence through a love of logistics and a great facility at making friends. He walks down to the waterfront his first day off the train and meets the son of a shipyard owner; on his way to the recommended work he meets an old bosun type who explains shipfitting. He also gains the regard of the owner by reading.
The espionage plot wasn't as good, because he was pretty stupid (Tell the Grownups, subcategory iii: Tell the FBI) and didn't suffer for it; the German-named saboteurs with little black mustaches get caught.
No ISBN, and it isn't listed by Worldcat even though I checked it out of the Seattle Public Library, which generally does show in those listings. Behold a gap in the internet, tho' I guess I'm doing my bit to darn it.
Brier, Howard M. Swing Shift. New York: Random House, 1943.So wrote clew in Cities. , Fiction (20th c.).