The book will focus their romance since they met first time in 1997 at a charity football match, reported Contactmusic.
"David's a huge romantic at heart. He's kept tons of love letters and cinema receipts from the early days of their life together and has all the kids' hospital birth tags.
"He has decided to get everything put into a leather-bound book that he can give to Victoria as a momento of their time together," said a source.
