Killers of the Flower Moon: The film Leonardo DiCaprio, Brad Pitt, George Clooney and more are fighting over

A bidding war seems to have broken out for the rights to adapt David Grann’s Killers of the Flower Moon, attracting A-list stars and producers.

Clooney, Pitt and DiCaprio are all in the mix with their respective production companies, according to The Tracking Board, along with Star Wars producer Kathleen Kennedy, X-Men’s Brett Ratner, Jason Blum of Blumhouse (Whiplash) and many more.

Written by New Yorker staff writer Grann, the book isn’t set to be published until June, 2017, but has already got Hollywood hungry.

So what’s it about?

Killers of the Flower Moon is a non-fiction book that ‘chronicles the real-life 1920s mystery surrounding the suspicious deaths of several Osage Indians, who were at the time among the richest people on the planet,’ TTB reports. ‘The story follows the twists and turns of the investigation that eventually became the first major case solved by J. Edgar Hoover’s brand new FBI.’

Osage men, circa 1865 (Picture: American-Tribes)

It’s easy to see why this would be of interest to DiCaprio, who famously played Hoover in Clint Eastwood’s 2011 film, J. Edgar.

Several of these big names are rumoured to be partnering up to land the project, with studios apparently already preparing bids.