What's alike with each of these? They need to be sharp to get the job done!
In the literary world, your hook is one sentence that sums up the entire book. This is not always as easy as it sounds. I spent two years pouring over every deatil in my manuscript. 50,000 words later I have finished and now I need to boil this down to one sentence? Hmmm...this may take me a couple of more months.
I have changed my hook alot during the book proposal process. I needed something that will intrigue people to want to learn more, without divulging too much where they would loose interest. This revelation came to me about 1 am last night. Now if you ever run into me and ask what my book is about, I could tell you in thrity second before the elevator reaches the next stop.