If you read Anne Rooney's fascinating post yesterday about researching for historical non-fiction and fiction, you'll want to enter our competition with a chance to win one of five copies of The Story of Maps. Just answer the following question:
"Is there a map or atlas that has meant a lot to you, led you astray, or inspired you? Describe it and its impact in the comments below."
Then copy your answer to readers@maryhoffman.co.uk so you can be contacted if you win.
Closing date 7th December
Our competitions are open to UK Followers only.