Prince Harry has written the foreword for the charitable book, Hospital by the Hill, which will be distributed to children across the UK who have lost a loved one to Covid-19.
The children's book, which will be released on 23 March for National Day of Reflection, follows the story by Chris Connaughton of a young child whose mom dies after serving as a frontline medical worker. In the foreword, Harry speaks of how Diana's tragic death "left a huge hole inside of me".
He writes, in the text obtained by E! News: "At the time I didn't want to believe it or accept it. I know how you feel, and I want to assure you that over time that hole will be filled with so much love and support."
Harry continues: "We all cope with loss in a different way, but when a parent goes to heaven, I was told their spirit, their love and the memories of them do not. They are always with you and you can hold onto them forever. I find this to be true."
The book's publication comes after Harry and Meghan's explosive interview with Oprah Winfrey in which they opened up about their mental health and more – and news that the Duke of Sussex has since tried mending his relationship with the royal family.
"You may feel alone, you may feel sad, you may feel angry, you may feel bad," he writes in the foreword. "This feeling will pass. And I will make a promise to you—you will feel better and stronger once you are ready to talk about how it makes you feel."