Well, Canva provides a lot of templates to design ebooks, however, Canva ebook templates are mostly designed for image based ebooks, or workbooks, it cannot help you to design text based ebooks. There is a tool called designrr.io which helps you to create blog posts, podcasts, and videos into ebooks, flipbooks, and PDFs. For instance, if you want to convert your wordpress blog post into ebook, you can easily do it through this platform. Or, if you want your videos to be converted into ebooks, you can do it through Designrr. But sadly this is a paid tool, with no free version available. Do you know about any tool that will help you create ebooks but are free to use?