The 'mummy porn' book Fifty Shades of Grey has become the fastest adult paperback to sell one million print copies.
Author Dan Brown holds the record for overall weekly adult sales for The Lost Symbol hardback which sold 590, 964 copies in 2009.
JK Rowling still holds the single week record across all genres, for the last in the Harry Potter series.
- Fifty Shades of Grey sets 1m Kindle record
26 Jun 2012
- 'Kinky' ebooks sell fast in age of digital privacy
21 May 2012
- 50 Shades of Grey - top seller
18 Jun 2012
- Review: 'Mills & Boon with bondage'
13 Apr 2012