Poul Anderson

What is the first Nicholas van Rijn stroy or novel?

Some would say Margin of Profit, which was first published in 1956, which puts it ahead of War of the Wing Men in 1958. The original publication of Margin of profit did have some basic differences in the timeline though:

See here.

Moved MPSIMS --> Cafe Society.

Thanks!
I read Margin of Profit in The Van Rijn Method this morning.

A lovely series of stories and books, by damn and horse maneuvers!

Nice memories! I knew that was a tricky question. Thought I’d check here first before employing my vast skills in Google-Fu. Of course, 10 minutes from now This Thread will probably be in the top 5 results.