For an introduction, labor historian Erik Loomis wrote the excellent “A History of America in Ten Strikes”. It’s a synthetic work (little original research, mostly drawing from other works), but it cites its sources so it functions as a very short (like 200 pages of simple text) extended table of contents.

This recommendation means more coming from me because Loomis is pretty infamously, uh, not a nice person and I’ve personally had negative interactions with him (so you might see weird criticisms of him which are actually not related to his work). That said, he is a good scholar and his work is solid.

Are there any specific periods/questions you are interested in from there? It sounds like you want to learn about the global labor movement too?