The couple's anniversary falls on July 4 and, according to friends, the 37-year-old football star has compiled a volume of material charting their relationship since they first met in 1997.
"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," a website quoted a source as saying.
"He has decided to get everything put into a leather-bound book that he can give to Victoria as a memento of their time together," said the source.
Mumbai Roundup: 9 incidents that took place this week
Photos: Ajay Devgn, Parineeti, Tabu at 'Golmaal Again' trailer launch
Photos: Dipika Pallikal Karthik oozes oomph in bikinis and sarees
Photos: Kareena Kapoor Khan's grand birthday bash
Photos: 'Dangal' girls Sanya Malhotra, Fatima Sana Shaikh's dinner outing