Anthologize is a free, open-source, plugin that transforms WordPress into a platform for publishing electronic texts. Grab posts from your WordPress blog, import feeds from external sites, or create new content directly within Anthologize.
Papyrus Alternatives
Papyrus is described as 'Simple online editor to create ebooks.You can edit the cover using a simple drag and drop cover editor, import content from the web, or create new content as easily as writing a blog post.If you want to sell your ebook, all you have to do is set a price and click' and is a Ebook Editor in the news & books category. There are more than 10 alternatives to Papyrus, not only websites but also apps for a variety of platforms, including Mac, Windows, Linux and Self-Hosted apps. The best Papyrus alternative is calibre, which is both free and Open Source. Other great sites and apps similar to Papyrus are Sigil, Kavita, Calibre-Web and BookFusion.