Gary Sinise released his most personal book to date on Tuesday, a memoir honoring his late son Mac that arrives on what would have been Mac's 36th birthday. 'Graceful Warrior: The True Story of a Son, a Father, and a Family Who Carried Each Other Through' was published by Nelson Books.

McCanna Anthony 'Mac' Sinise was born on Nov. 10, 1990, and died on Jan. 5, 2024, at 33, after a nearly five-year battle with chordoma, a rare bone tumor. In the book, Sinise recounts Mac's final moments and the years his family spent carrying each other through illness, grief and faith.

Sinise, 71, stepped away from acting in 2020 to focus on his family as his wife, Moira, and his son Mac both battled cancer. The book's release is backed by a national media tour that includes a People magazine cover story, appearances on the TODAY show, the Joe Rogan Experience and Fox News, and events at three presidential libraries.

In interviews tied to the memoir, Sinise said he has not ruled out acting again. 'Will I go back to acting? I may for the right thing with the right people — if it feels right,' he told People, adding that he could no longer take on roles that would keep him away from home for two or three months at a time.

A documentary about Sinise, 'The Ballad of Lieutenant Dan,' also reached digital platforms on Tuesday. And Mac's music lives on: a third album of his compositions, 'Resurrection & Revival: Part Three,' is out through the Gary Sinise Foundation, with proceeds supporting its work for veterans, service members and first responders.