The test of a writer is whether you want to read him again years after he should by the rules be dated.

I'm a licensed private investigator and have been for quite a while. I'm a lone wolf, unmarried, getting middle-aged, and not rich. I've been in jail more than once and I don't do divorce business. I like liquor and women and chess and a few other things. The cops don't like me too well, but I know a couple I get along with. I'm a native son, born in Santa Rosa, both parents dead, no brothers or sisters, and when I get knocked off in a dark alley sometime, if it happens, as it could to anyone in my business, nobody will feel that the bottom has dropped out of his or her life.

I needed a drink, I needed a lot of life insurance, I needed a vacation, I needed a home in the country. What I had was a coat, a hat and a gun. I put them on and went out of the room.

Some are able and humane men and some are low-grade individuals with the morals of a goat, the artistic integrity of a slot machine, and the manners of a floorwalker with delusions of grandeur.

There are people who can write their memoirs with a reasonable amount of honesty, and there are people who simply cannot take themselves seriously enough. I think I might be the first to admit that the sort of reticence which prevents a man from exploiting his own personality is really an inverted sort of egotism.

The impulse to perfection cannot exist where the definition of perfection is the arbitrary decision of authority. That which is born in loneliness and from the heart cannot be defended against the judgment of a committee of sycophants. The volatile essences which make literature cannot survive the clichés of a long series of story conferences.

Love interest nearly always weakens a mystery because it introduces a type of suspense that is antagonistic to the detective's struggle to solve the problem. It stacks the cards, and in nine cases out of ten, it eliminates at least two useful suspects. The only effective love interest is that which creates a personal hazard for the detective - but which, at the same time, you instinctively feel to be a mere episode. A really good detective never gets married.