May 16, 2007, 13:00 GMT
Ozzy Osbourne has missed the deadline to finish his autobiography.
Ozzy Osbourne - © Scott Alan / Photorazzi
The rocker signed a lucrative deal to publish a tell-all tome about his battle with alcoholism, drugs, depression and his marriage to Sharon Osbourne.
However, Ozzy has been too slow putting pen to paper and the book - which was due to be released in time for Christmas - has now been postponed until next year.
Ozzy's publicist Gary Farrow told Britain's The Independent newspaper: "He just hasn't written it. He is always doing something else, either recording or busy with his festival Ozzfest.
"Sharon is always trying to persuade him to sit down and write, but he won't."
Sharon is now reportedly set to salvage relations with Little, Brown and Company publishers by writing a follow-up to her best-selling 2004 memoir 'Extreme'.
She will team up with ghostwriter Penelope Dening again and they hope to have the book ready for an autumn release.
Ozzy's career has been plagued by controversy.
The former Black Sabbath frontman's behaviour worsened during the 80s when his alcoholism and drug abuse spiralled out of control. He infamously bit the head off a bat during a performance.
He reportedly admitted to killing 17 cats at the height of his drug addiction and was accused of glorifying Satanism with his song lyrics and stage decorations.
After attempting to strangle Sharon in 1989, he sought help for his addictions in rehab.
In recent years, he has attracted a new army of fans with MTV reality show 'The Osbournes' and was diagnosed with Parkinsonian Syndrome in 2005.
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