Pressbooks + H5P. https://pressbooks.com/ http://h5p.org Both are open source but have hosting for fee options. Both are WordPress plugins. If you're willing to make the book OER there may be funding from your institution/state. In Ontario, eCampusOntario pays for premium hosting and it's free to use. Premium hosting supports LaTeK Markup & hypothes.is annotations.
Pressbooks + H5P. https://pressbooks.com/ http://h5p.org Both are open source but have hosting for fee options. Both are WordPress plugins. If you're willing to make the book OER there may be funding from your institution/state. In Ontario, eCampusOntario pays for premium hosting and it's free to use. Premium hosting supports LaTeK Markup & hypothes.is annotations.