This is a great novel - I would not have known about it had it not been on the Booker short-list, and very strongly recommended by a BBC critic.
It is based on the historically true lynching of Emmett Till in Money, Missiissippi, which itself was based on false evidence.
The huge achievement of Everett is to take such a tragic story as the history of lynchings of black men (always) and make a riotous comedy of it, reversing all the stereotypes (the detectives are black, for instance) - and moving us inexorably deeper and deeper into the mystery of why the murders of white people are accompanied by a long-dead black body (which might then disappear.)
Real and surreal, true and wildly fictionalised, it comes to a climax with the names of every man lynched in the past 100 years or so.
An absotue triumph. Could be the new GRAPES OF WRATH.