To tempt the publisher to take your open application seriously and to help him to come to a balanced opinion which also works out to your advantage you must pay attention to the information you send. It goes without saying that you include your manuscript but in what form? With non-fiction, you can also choose not to write the entire manuscript first, but first to send a detailed proposal in combination with one or two chapters. If you have already finished writing, send a synopsis with your manuscript in which you summarize the core of your book and tell more about the background. To make a book from PDF this is important now.
Do not forget to indicate the qualifications that make you a credible author. Every reader will want to know and you can show this to the publisher through a business biography of your background and experience.
Hold on
The road to a publisher is almost always paved with rejections. In order not to become discouraged, perseverance and a belief in one’s own qualities are essential. Also, remember that you write a book with a business goal in mind and that there are more ways to achieve that goal. This way you can