The awards, which recognise the most outstanding books of the year written by authors based in the UK and Ireland have awarded 'The Volunteer' by Jack Fairweather with the Book of the Year Award.
The author of 2019's Costa Book of the Year Award reflects on the literature that helped him understand one of history's darkest periods.
Penguin Random House authors win three of the five categories – Best Novel, Best First Novel and Biography. All three authors will be in the running to win 2019 Costa Book of the Year.
Jack Fairweather is a British writer and former war reporter in Iraq and Afghanistan, and the author of A War of Choice, The Good War and The Volunteer. He splits his time between the UK and Vermont.