I would like to embed a scorm package (or HTML) -e.g. that developed in ispring, into my Moodle book. What is the best way to go about doing this?
You really can't. I mean, you could, theoretically create an iframe and force it but that would be a really bad idea--scorm reporting is really fragile and iframes are generally frowned upon anyway. sticking a scorm in an iframe would be asking for trouble in so many ways. You CAN embed an H5P in book. I've seen it done and it works really well. but that means recreating your content.