…than it is to write a lot! And that’s the truth.
If you don’t believe me, try writing the blurb for the back cover of a novel, where you have a mere 250 words to grab the reader’s interest without giving away the plot.
The front cover creates the first impression. It has to be appealing, piquing the reader’s interest enough for her to turn the book over and read what it’s about on the back cover.
That’s make or break time, and the last thing you want is for your potential reader to pass on your story. You just have to say something clever enough to hook the reader and make her decide to pick up your book. A successful and often-used technique is to pose a question, making the reader want to find out what happened, or who did what to whom.
Publishers actually have a “blurb committee” which scrutinizes what you’ve submitted on the data sheet you fill out when the book goes under contract. They know how to sell a book and can “commercialize” the blurb with exactly the right components…it’s both an art and a science.