How much does American book writing company charge for a book?

The process of developing drugs is the area of expertise of pharmaceutical scientists. With their research and natural ingredients, they create new medicines. They really want to know of an American Reliable book writing company that can write a book for them in a shorter amount of time because they are writing a book for medicines but don't have the time. Which will benefit everyone in the United States. Which American book writing company is the best?

They charged a realiabe cost and quality work provide to the customer, I tried once "https://penguinsclassicwriters.com/ for my ebook writing they charged reasonable price for book writing.