“Best marks go to cheaters and memorizers. Marks depend on memorizing and not on real knowledge. When you cram into your head for a test you may get a high mark but forget it the next day. That's not an education. I suggest just Good and Bad at the end of the term on report cards. Or maybe nothing. Frank Allen”

“You don't get the good shots sitting on your ass in the bad weather- Mark Johnson”

“The most important thing for any con artist is never to think like a mark. Marks think they can get something for nothing. Marks think they can get what they don’t deserve and could never deserve. Marks are stupid and pathetic and sad. Marks think they’re going to go home one night and have the girl they’ve loved since they were a kid suddenly love them back. Marks forget that whenever something’s too good to be true, that’s because it’s a con.”

“One day, someone who'll understand your good points and bad points, but who'll love you just the same, will appear in your life. Mark my words!”

“Mark your mark, get off your mark, hit the mark and make your mark.”

“I have never read anything quite like Mark Haddon's funny and agonizingly honest book, or encountered a narrator more vivid and memorable. I advise you to buy two copies; you won't want to lend yours out.”