eBooks are one of the popular content type for content marketing. The best thing about ebook is you can not only use ebooks for marketing but also sell ebooks and make additional income. Another great thing about ebooks is it will help you build your authority. let's say if you are a marketer working on healthcare industry. If you publish an ebook about the work you so, people will see you as an expert and start trusting you. You will start getting more sales. eBooks are the best content for generating leads.