The University of Chicago Press free book this month is
Troublemakers: Chicago Freedom Struggles through the Lens of Art Shay by Erik S Gellman and Art Shay. Per its blurb, this features 250 photos by Art Shay with Gellman's accompanying commentary.
As always you have to give UChi Press your email address, but they don't abuse it. The link to the free book page is:
https://press.uchicago.edu/books/freeEbook.html
And, they also have a sale going on right now, which is supposedly running through June 15, 2023. Which starts to sound more like pricing decisions, and less like a sale...but what do I know. Info is here:
https://press.uchicago.edu/ucp/books...alog/vc60.html