I just tried it -- I couldn't figure out how to save directly, but I could save the page as a PDF to Files and then from Files share it to Books. Note: if the

I just tried it -- I couldn't figure out how to save directly, but I could save the page as a PDF to Files and then from Files share it to Books. Note: if the page you are saving makes use of deferred loading of images you may need to scroll all the way down before starting this whole process.