David Elliot Grann (born March 10, 1967) is an American journalist, a staff writer for The New Yorker, and author.

[3] He has written for The New York Times Magazine, The Atlantic, The Washington Post, The Wall Street Journal, and The Weekly Standard.

[3] According to a profile in Slate, Grann has a reputation as a "workhorse reporter", which has made him a popular journalist who "inspires a devotion in readers that can border on the obsessive.

[7] While still in college, Grann received a Thomas J. Watson Fellowship and conducted research in Mexico, where he began his career as a freelance journalist.

For decades, explorers and scientists have tried to find evidence of both his party and the Lost City of Z. Grann also trekked into the Amazon.

[17][18][19] In March 2014, Grann said he was working on a new book about the Osage Indian murders, considered "one of the most sinister crimes in American history.

"[20] His book Killers of the Flower Moon: An American Crime and the Birth of the FBI was published in 2017, chronicling "a tale of murder, betrayal, heroism and a nation's struggle to leave its frontier culture behind and enter the modern world.

"[25] Former President Barack Obama selected The Wager as one of his summer reading books, a popular booklist he shares annually.