Which biographies and autobiographies have sold the most since 2001? Which have sold the fastest?• Download the dataThey may now be the least popular type of book, but as recently as 2005, sales of autobiographies were not doing so badly. Last year, autobiographies made up just 0.58% of all book sales, while 'romance and sagas', accounted for 11.26%, due partly to the huge success of EL James' Fifty Shades of Grey.Nielsen BookScan collected the data directly from over 35,500 bookshops' point of sale systems on a weekly basis.