I just finished reading this...
Great fun, and much better than I expected.
The Spare Man.
The Thin Man in Space — That’s what The Spare Man is. Not the novel by Dashiel Hammet, mind you, but the films that follow Nick and Nora Charles as played by William Powell and Myrna Loy. I adore these films.
https://whatever.scalzi.com/2022/10/17/the-big-idea-mary-robinette-kowal-6/
Book
https://bookshop.org/books/the-spare-man-093f0afd-c7b8-483d-911b-353fe1783e0f/9781250829177
@corlin Oooh thank you for the recommendation, I love those films