Not the best written thing I've read and I only wouldn't recommend because I think you'd have to be really interested in the nitty gritty, and willing to slog through a hundred names of people you never heard of and may never heard of again, just to get through it. Plus there's a lot of typos and the author isn't the greatest at putting it all together...
But it's a history I had never heard of before and, as a NYC union teacher, means a lot to me. Fascinating that the Local 2, the TU (Teacher's Union) preceded the current UFT (United Federation of Teachers) and was so radical. The main things I learned were about how the TU:
1) was dominated by communist party members, divided along lines of those who wanted to follow the Comintern (soviet) line and those who wanted an independent American communist movement,
2) advocated a social justice version of unionism much like today's UTLA (United Teachers Los Angeles) as opposed to simply improving teacher's working conditions,
3) fought for their union to be associated with the CIO as for teaching to be recognized as industrial labor as opposed to 'professional' labor as their opponents and modern reps advocate.
Even researching the union afterward, I found that today's modern AFT (American Federation of Teachers) cites Local 2 in their short website's history page, but basically accuses them of having been disruptive - while denying communist influence and calling it simple 'redbaiting'. But the story in this book is far more interesting to me. It seems that there WERE major communist trends of power within the American labor movement from the 1930s onward and the crime of crushing it wasn't that people were accused of being communists who weren't (though certainly it happened) but rather that there was a vibrant communist movement that should be regarded with admiration! It posed a threat to power and it's a shame that the anti-communist hysteria of the 50s work in crushing it.