In a press statement, Graham added: "After the huge impact of Adolescence, I realised there was a greater need for communication between fathers and sons.
"There is arguably an even bigger disconnect than ever before, and I would love to help create more opportunity for fathers to reach out to their sons and carry on the conversation.
"We want to hear from men of all ages, first-time fathers, absent fathers, fathers who've been there but never truly been there, fathers who've lost and fathers who just want to find a way to say I love you, to tell their sons what they mean to them and to talk openly about what it means to be a man."
The book will be published in October 2026.
Graham is working on the project with psychology lecturer Orly Klein.
The pair will make a donation for every letter published to the charity ManUp? and social enterprise Dad La Soul, two organisations that support young men struggling with mental health. Bloomsbury will also make a donation to ManUp?

