I assume you need this for a submission to an agent or editor, yes? First off, don't sweat this so much. If it's for an agent or editor, we want to know a smattering about you and why you wrote the book. What unique qualities did you bring to your writing that makes your work connect with a specific audience. Lastly, what are your future plans? We want to know if you're a one book trick or if you have other books up your sleeve.
Here's a general sample. It's not Hemingway, but it may give you some ideas.
I wrote XYZ because I’m well-versed in medical fiction and know there aren’t any books that blend two of my favorite topics – alternative medicine and how doctors handle controversy. The 2007 New England Journal of Medicine states that 27 billion out-of-pocket dollars are paid to alternative medical practitioners, so I believe X and Y’s passion and dedication will fill a void in the medical fiction genre. It’s important to know that not every doctor is X, and that a doctor’s belief system affects how they care for their patients. There are many ongoing debates that surround the uses of alternative medicine, and I plan on a five book series that will become the “go to” source dedicated to this issue.