Sean Woods of Rolling Stone praised Grann's book, noting, 'In his masterful new book.Grann chronicles a tale of murder, betrayal, heroism and a nation's struggle to leave its frontier culture behind and enter the modern world. Writing for The New York Times, Dave Eggers called the book 'riveting' and wrote, 'in these last pages, Grann takes what was already a fascinating and disciplined recording of a forgotten chapter in American history, and with the help of contemporary Osage tribe members, he illuminates a sickening conspiracy that goes far deeper than those four years of horror. The review aggregator website Book Marks indicated that overall Killers of the Flower Moon received rave reviews from literary critics. The book details the newly formed FBI's investigation of the murders, as well as the eventual trial and conviction of cattleman William Hale as the mastermind behind the plot. Officially, the count of the full-blooded, wealthy Osage victims reaches at least twenty, but Grann suspects that hundreds more may have been killed because of their ties to oil. The Osage are viewed as the 'middle man' and a complex plot is hatched to eliminate the Osage inheritors on a one-by-one basis by any means possible.

After the Osage are awarded rights in court to the profits made from oil deposits found on their land, the Osage people prepare to receive the wealth to which they are legally entitled from sales of their oil deposits.

The book investigates a series of murders of wealthy Osage people that took place in Osage County, Oklahoma in the early 1920s-after big oil deposits were discovered beneath their land.

A film adaptation directed by Martin Scorsese and set to star Leonardo DiCaprio, Robert De Niro, Jesse Plemons, Brendan Fraser, and Lily Gladstone is currently in production for a 2023 release. Time magazine listed Killers of the Flower Moon as one of its top ten non-fiction books of 2017. Killers of the Flower Moon: The Osage Murders and the Birth of the FBI is the third non-fiction book by the American journalist David Grann.

The blue flower book