"I like things to be neat and tidy. I like things to be in order."

"If you confront anyone who has lied with the truth, he will usually admit it - often out of sheer surprise. It is only necessary to guess right to produce your effect."

"I suppose it is because I have been so happy that I have not wanted to write about it."

"I have always believed to write a good detective story, you must know all about detective stories."

"Never go back to a place where you have been happy. Until you do it remains alive for you. If you go back it will be destroyed."