Mary enjoys _________________.

Mary: You enjoy going through secondhand bookstores, don’t you? It is interesting to see what people used to enjoy reading. Did you see this old book of children’s stories?
John: Some of these books aren’t so old, though. See? This mystery was published only six years ago. It cost seventy-five cents. You can’t beat that.
Mary: Ha! Look at this book !
John: What? Are you getting interested in nineteenth-century poetry all of a sudden?
Mary: No. Look at the inscription. Someone gave this book as a present and wrote a note on the inside of the front cover. It is dated 1874. Maybe it is worth something.
John: Everything on that shelf is worth 55 cents.
Mary: But if this is the signature of someone who is well known, it might bring a lot more. I hear Mark Twain’s signature is worth about 0.5 million dollars.
John: Oh? I can hardly read what that one says. Who wrote it?
Mary: The name looks like "Harold Dobson". Maybe "Dobbins"? Wasn’t he a politician or something? I am going to buy this book and see if I can find a name like that in the library.
John: Good luck. Your poetry book may make you rich, but I will bet my seventy-five cents mystery is a good buy.