Amy, My Daughter contains family photographs and a collection of notes and personal letters from the late singer, who passed away last July at the age of 27.
He explained that one of the main reasons behind the release of the book was to dismiss lingering rumours that she had taken her own life.
When asked why he released the letters, he told Daybreak: There were three main reasons. The first one was that immediately after Amy passed away, there was speculation that she committed suicide, which was in the papers.
"There was speculation that she was still taking drugs, [that she died] from a drug overdose. They were the kind of rumours I wanted to dispel."
Author proceeds from sales of the book will benefit the Amy Winehouse Foundation, a charity founded by the singer's family after her death.
Winehouse added that compiling the book gave him a form of therapy since the death of his daughter.
"I also felt it would help me with my personal recovery, which it did to a certain extent, and - as you know - we created the Foundation almost immediately after Amy's passing, and I felt that this would be a fantastic way to kickstart the finances for the Foundation.
"So all of my... the author's proceeds go into the Foundation, and it's a considerable amount of money."
Amy, My Daughter is released today (Thursday, July 5) in the UK.
Watch Amy Winehouse performing 'Love Is a Losing Game' live at the Mercury Prize 2007: