What You're Actually Looking For
The thing is, I need to be upfront about something here. I don't have solid information confirming that David Grann wrote a book or major piece specifically titled around "Phil Ivey And The Wager." David Grann is a well-known New Yorker staff writer, and his recent book The Wager is about an 18th-century British warship, mutiny, and survival — completely unrelated to poker or Phil Ivey. I've checked my knowledge base and I can't reliably connect those two subjects. If you're thinking of a David Grann piece about Phil Ivey, it's possible you're mixing up the title or the author. Grann has done longform sports and competition writing before, but nothing I can confirm that specifically targets Ivey's career or the high-stakes baccarat cases that made international news.
Phil Ivey And The Wager David Grann — Where To Actually Look
Here's what I can tell you with reasonable confidence. Phil Ivey is one of the most accomplished poker players in history, and he was also involved in those famous casino baccarat cases where he used edge sorting to win millions. That story got covered extensively in outlets like the New York Times, Bloomberg, and ESPN. If someone told you David Grann wrote about it, it might have been a different writer at the same publication. If you want to read about the baccarat cases specifically, search for "Phil Ivey edge sorting Crockfords" or "Phil Ivey MGM baccarat lawsuit." Those cases were litigated in UK courts and California state courts, and the legal opinions are publicly available. The UK case is Crooks v Ivey [2018] EWHC 269 (Comm). Reading the actual judgment takes about 45 minutes and it's far more detailed than most secondary coverage. For actual Grann reading material, The Wager is available through standard booksellers and libraries. It won the National Book Award. If you're into competitive pressure and high-stakes decision-making under uncertainty, it's worth the time even though it has nothing to do with poker.
I can't give you a direct download link for anything by Grann about Ivey because I can't verify that such a piece exists. I'd rather not send you down a rabbit hole leading to a pirated PDF of the wrong book. If you have a specific article title or publication in mind, share it and I'll help you track down the correct source.