A traditional publisher will typically receive between 15% and 50% royalty from their authors, depending on the level of work they are doing for the author. This can be achieved in the same way as a normal business contract, where the author agrees to give the publisher a certain percentage of their book sales in return for the publisher's services. The size of the royalty depends on a number of factors, including the type of publishing company, the type of book, and the sales price. For example, a large publishing company may only offer a 20% royalty to an author, while a smaller company may offer a 50% royalty. Ultimately, it is up to the author to decide how much they are willing to give up in order to have their book published.