“I wish I was able to hug you right now, I hope this story is able to provide you comfort in knowing that you’re not alone,” he continued. “Now, I never met them, but I know this person was special to you, and they were someone incredibly kind, caring and loving because of where they chose to work. Helping others is one of the most important jobs anyone can ever do.”

The book promotes the charities Simon Says, Child Bereavement UK and Winston’s Wish.

In the nearly 25 years since Diana’s death, Harry has followed in her footsteps in many ways, including by embracing charity work.

He spoke to Oprah Winfrey this month about how he has felt Diana’s “presence throughout this whole process” of leaving England for America. He said, “I think she saw it coming,” adding, “I think she would feel very angry with how this has panned out, and very sad… But ultimately, all she’d ever want is for us to be happy.”