I am writing a novel about someone being chased by the Russian Mafia. A hitman is sent to save her and that's where the books takes off. I have way too many titles floating in my brain - three to be exact. They are "Slap-Dash", "Tooth and Nail", and "Hang Fire". What is the most marketable title? Why do you think so?
I rather like "Hang Fire." Sounds mysterious and dangerous, it isn't quite grammatically correct as a phrase but it could be in the right context so it's got some tension pushing me towards exploring it, and it's visually evocative.
I also encourage you to find a phrase or proverb in Russian which makes sense when translated to English and see if that works.
Find a phrase or topic that is relevant to your story. If any of these three pertains to something that happens or is stated in the story, then go with that. If none of them do, then try to think of something else. I like Lauren's suggestion to go with a Russian phrase that can be easily translated.
Personally, the first two sound more like titles for a comedy or a romance novel. Neither really sparks thoughts of murder and intrigue. Since the term "Hang Fire" refers to a failure on the part of a weapon, I could see it being relevant, considering that a hit man is usually associated with killing someone, not saving them.
I would definitely avoid Tooth and Nail - it's already heavily overused.
I confess, all three titles sounded very generic and indistinct to me. They tell me this is an action-packed thriller, but nothing more specific than that. I'd recommend you consider what you find to be the most interesting, important, and/or unusual elements of your book, and try to construct a title referring to one or two of those (even if the reference oblique, it's still individual!). Of the three, Hang Fire stands out most for me, but I would really consider it worthwhile to look for something a little less generic - a title that applies to your book, that wouldn't apply as easily to scads of others.
Without knowing more about your book - central themes, conflicts, characters, motivations, location - I'd have a tough time recommending anything suitably tailored to your particular work. Here's an article on title-choosing you might find helpful.