My apologies for the delay — I don’t know how I missed these.
First, I would recommend this: https://mises.org/library/history-labor-unions-colonial-times-2009
He originally wrote that for an encyclopedia I was editing, but the publisher thought it was too ideologically charged.
Then there’s Power and Privilege: Labor Unions in America https://mises-media.s3.amazonaws.com/Power%20and%20Privilege%20Labor%20Unions%20in%20America_2.pdf?file=1&type=document
Then there’s Opportunity or Privilege: Labor Legislation in America, by Charles Baird.
Finally, Labor Economics from a Free-Market Perspective, by Walter Block.