цитата
The top category of ghosted titles remains the misery memoir, books such as Tell Me Why, Mummy or Please, Daddy, No, or Sharon Osbourne's Extreme: My Autobiography. At its peak, this genre accounted for almost 10% of the UK book market, closely followed by celebrity autobiographies (Russell Brand's My Booky Wook), true-crime memoirs (Dave Courtney's Stop the Ride, I Want to Get Off), sporting lives (Wayne Rooney's My Story So Far) and tales of derring-do (Bruce Parry, Bear Grylls, et al).
http://www.theguardian.com/books/2014/jul/27/bestse...
Если кратко: до 10% британского книжного рынка -- сочинения писателей-призраков («литературных негров»), сочиняющих «автобиографии» знаменитостей.
А вы говорите -- «проЭкты»...