(CBS News) Ryan O'Neal details Farah Fawcett's last moments in his new book, "Both of Us: My Life With Farrah," due out Tuesday.
The book follows their love story, as well as O'Neal's troubled relationship with his daughter, Tatum, and son, Griffin. It chronicles the couple's split in 1997 and reconciliation years later. O'Neal's story also details Fawcett's battle with cancer.
The Daily Mail published excerpts from the book, including specifics of Fawcett's 2009 death.
"After the priest leaves, I lie down next to her, wrap my body around her to keep her warm, and then take her hand," O'Neal explains in the book. "I can feel a steady pulse. Her oncologist Dr Piro comes into the room and says: 'I had hoped I would never have to say this, but I think we should let her go.'"
"I'm left alone with my love," O'Neal, 71, adds. "I take her hand. I can still feel her pulse, but now it is fluttering. She's trying to let go. Her heartbeat slows, then disappears. On the morning of June 25, Farrah slips into eternal sleep."
The book includes never-before-seen photographs, as well as love letters and O'Neal's diary entries.
O'Neal, who recently announced he has Stage 2 prostate cancer, was scheduled to appear on the "Today" show Monday to promote the book, but ended up leaving the NBC set.
Host Matt Lauer said, "We are sad to say Mr. O'Neal showed up here this morning ... he was not feeling well."