A note on the singer's fan site True to You said that the decision was made over "a last-minute content disagreement between Penguin Books and Morrissey." The former Smiths frontman is now searching for a new publisher (though don't count on finding a leaked version: no advance copies were made available for review).
Moz's book was supposed to chronicle the singer's time growing up in Manchester, and in particular his relationship with his old writing partner in the Smiths, guitarist Johnny Marr.
The word "cancellation" has grown more and more associated with Morrissey over the past year or so, much of it related to the singer's ongoing health problems: A bleeding ulcer caused him to bag more than 20 shows on his North American tour, and he recently called off his South American tour due to a lack of funding (those dates were initially postponed after Moz suffered a serious bout of food poisoning).
Morrissey also backed out of an appearance on Jimmy Kimmel Live after the outspoken vegan and PETA advocate found out he would be appearing alongside the cast of the A&E reality series Duck Dynasty, about a family that makes products for duck hunting.