ISTANBUL — A new book written by three Turkish reporters and drawing on audio recordings of the killing of a Saudi expatriate, Jamal Khashoggi, offers new details about an encounter that began with a demand that he return home and ended in murder and dismemberment.

“First we will tell him ‘We are taking you to Riyadh,’” one member of a Saudi hit team told another, the book claims. “If he doesn’t come, we will kill him here and get rid of the body.”

Turkish officials have cited the recordings, saying they captured the death of Mr. Khashoggi, a journalist, in his Oct. 2 visit to the Saudi Consulate in Istanbul. And intelligence officials leaked some details in a campaign to force Saudi Arabia to own up to the crime.

But the new book offers the most comprehensive description to date of what is on those recordings. It sets the scene as a team of Saudi operatives lay their plans before Mr. Khashoggi arrives, and then recounts what happened next.