David Beckham's father is set to earn a six-figure sum, after writing a secret book about his son.

The Real Madrid ace is said to be furious that his dad Ted spent six months penning the biography without telling him.

Ted apparently hopes that he will be able to retire from his job as a gas engineer once the 50,000-word book is published.

"I'm really pleased with the book," he told the Sunday Mirror. "It's come together really well. I talk about everything. The book is all about the early days right the way up to Madrid. But there's no dirty stuff in it - I wouldn't do that.

"David didn't always know I was doing it - but I'm really chuffed with it. I've sent him a copy, but I haven't had a response yet because he's away now."

A friend of Becks revealed, "David and Victoria were stunned. They find it amazing Ted could have kept this under his hat for so long."