For March, 2020, the University of Chicago free ebook is
Blood Runs Green: The Murder That Transfixed Gilded Age Chicago by Gillian O’Brien.
“Chicago’s reputation for dramatic crime and corruption predates Al Capone and Prohibition—by decades. In May 1889 Dr. P. H. Cronin, an esteemed physician, was found in a sewer. He was naked, dead, and savagely beaten. The investigation and trial caused an international sensation, and one of the world’s first media circuses, over a story that involved Irish revolutionaries and reactionaries, secret societies, and even a French spy.… All at a time when Chicago had been burned down, and was reborn as the fast-growing city in America.”—Scott Simon, NPR’s Weekend Edition
Check it out
here.