Dear Miss Snark,
During the crap’ometer I received a gracious beat down from you in response to my hook. I worked on it for a month. It was the crossbreed of a Pollack and a Rothko. If the words were images, they would be hanging in the Met today.
Agent X had a similar contest and I got down to brass taxes. Simple and plain. Too plain.
I have a good hook, but it is not something that you would put on the back of book jacket. You wouldn’t go to the video store, pick up the Sixth Sense, and read that Bruce Willis thinks he is alive the whole movie, but he is really dead. Do you give away secrets in the hook?
I know this is a subject of huge debate and there isn't a hard and fast rule. I say yes. I want to know you've got a twist. Perhaps not exactly what it is, but a solid indication this isn't boring.
I'll probably get a beating from my colleagues for saying this but you might try two versions of the query: one with, one without. You don't want to send them at the same time, but if one doesn't work, try the other. (I know, I know, this goes against everything I've said before)