It has the tropes of the genre : a tired detective in a metropolis he doesn't quite know, powerful men, booze and prohibition, sleazy journalists, and of course, melancholia, jazz and femmes fatales. But the rest is a very smart departure in an alternate history: what if the smallpox brought to America was a non-lethal variant? The Native community would be thriving, along the Mississippi, it would have a city and a state built on their power and syncretic beliefs. That's Cahokia, where the delicate balance that holds it all is threatened by a gruesome murder. It's a book that takes you in, and embraces you and makes you believe that Cahokia is real and pulsating, on the right bank of the Mississippi.