Grand Central Publishing's Da Capo imprint has set a tentative September 2027 release date for MEGADETH mainman Dave Mustaine's next memoir, 'In My Darkest Hour'.

The book will detail Mustaine's treatment after he was diagnosed with squamous cell carcinoma at the back of his tongue in 2019.

Co-written by The New York Times journalist Joe Layden, who previously worked with Mustaine on his autobiography and on original KISS guitarist Ace Frehley's memoir, 'In My Darkest Hour' will take readers from the treatment room to the studio as Mustaine chronicles how his diagnosis inspired him to take up the pen and guitar pick, going from radiation and chemotherapy appointments straight into hours-long recording sessions, resulting in MEGADETH's sixteenth studio album, 'The Sick, The Dying…And The Dead!' Along the way, Mustaine details how confronting his own mortality brought him closer to his family, taught him how to ask for help, strengthened his faith, and challenged the vulnerability of his art.

The book is described as a masterful portrait of a Dave Mustaine that the world has yet to see, and serves as a moving reminder that even our most invincible heroes are human.