Unwanted copies of books including The Da Vinci Code and Angels & Demons pushed Brown to the top of the most donated authors list, ahead of crime writers Ian Rankin and Patricia Cornwell.
Rankin, the prolific author of the Detective Inspector Rebus series, came top of the most sold list.
He was followed by Swedish author Stieg Larsson, who penned the Millennium trilogy, and big screen favourites JK Rowling and Stephenie Meyer, responsible for the Harry Potter and Twilight series.
Meanwhile, Top Gear presenter Jeremy Clarkson became the first non-fiction author to make the annual survey’s top 10 most donated list, at number eight.
Oxfam’s best-selling author Ian Rankin said: “Just looking at the terrible scenes from Pakistan and West Africa on our TV screens at the moment, it is clear how important the work of organisations like Oxfam is, and I’m really glad that my books are going some way to help this vital work.”
Oxfam is Europe’s biggest high street retailer of second-hand books.
- THE most donated authors to Oxfam shops (with last year’s position in brackets) were:
1. Dan Brown (1)
2. Ian Rankin (3)
3. Patricia Cornwell (9)
4. Alexander McCall Smith (New entry)
5. John Grisham (2)
6. Danielle Steel (4)
7. JK Rowling (7)
8. Jeremy Clarkson (New entry)
9. Maeve Binchy (New entry)
10. Bill Bryson (New entry)
- The Oxfam shop best-seller list:
1. Ian Rankin (1)
2. Stieg Larsson (New entry)
3. JK Rowling (New entry)
4. Stephenie Meyer (4)
5. John Grisham (New entry)
6. Patricia Cornwell (New entry)
7. James Patterson (9)
8. Terry Pratchett (5)
9. Kate Atkinson (New entry)
10. Dan Brown (2)