What I'm Reading

I'm reading Bill Bryson's "One Summer" and I just finished August: the Anarchists, which has just enough on Sacco and Vanzetti to make me want to read more about the case. While Bryson pretty obviously thinks they were guilty of murder, his brief description of events points in the other direction.

It’s always been clear that the pair were anarchists, but it’s also clear that they didn’t get anything near a fair trial on the charges of robbery and murder.
I’m wondering if any of the many, many books on the subject deal directly with the fact that neither robbery nor murder of working men was a hallmark of the anarchist movement. (Blowing up buildings and people, with the occasional political assassination thrown in for spice, was a different story.)
Can anyone out there recommend a few good books on the case?