Ari Emanuel, the 65-year-old agent and mogul who inspired the character Ari Gold on Entourage, has written a memoir called Roll the Calls about his rise from the CAA mailroom to running WME Group, TKO Group Holdings, and other major entertainment ventures. The book, ghostwritten by J.R. Moehringer, chronicles his decades-long career negotiating deals for major clients like Martin Scorsese and Dwayne Johnson while handling hundreds of brief daily calls.