Just purchased Affinity Publisher and it imports PDFs. I have used Apple's Pages extensively writing three books. Because Affinity Publisher can import PDFs, I have exported various Pages templates as PDFs and then imported them into Affinity Publisher. You can do that with ANY file. Grab any current Word.doc book template, create a PDF, then open it in Affinity Publisher. It may not be 100% accurate, but you might have to find tune your file some.