Possible Clues:

• Something bound to prove profitable?
• It's hot
• Outsmart rep number one
• Book that tells us where to find the finest wines
• It flies off the shelves
• Successful book
• Small square room for prisoners said to be consumed by drink? And that's supposed to be a success story!
• Literary hit
• Footballer George with, it’s said, store of wine that’s market success
• Popular book in French is small, digested by beauty, 21