I have mentioned in other comments to topics here that I prefer short blurbs. These are commonly called elevator pitches because they are designed to fit the scenario of a brief elevator ride when a busy potential publisher says, “Tell me about your story.”
You have ten to fifteen seconds to win her over. That is also about the time your blurb has to hook a potential reader before they move on to the next book. Ten or fifteen seconds is three or four dozen words, so you do not have time for detail; only time for an intriguing glimpse at characters, situation, conflict and tone — and a hook.
A Short blurb is useful where offering more information would give away plot twists and reveal spoiler information. In the example below, the story has three major twists in the opening chapter, as well as twists in each of the next few. I’m still refining this blurb, so thoughts and suggestions are welcome.
As Valentine’s Day approaches, we watch two lonely people trying to break out of the shells they’ve created. Set in 2016 London, the story weaves intense passion and tender love through a world of extreme wealth while a tragic past conspires to destroy.