JScolari4,
To send to friends, I once created a scrolling PDF file of a Photos app Motif photo book using the Preview app on the Mac. It's a bit laborious, and I am sure that there are better ways of doing it.
What I did was carefully take a screen shot of each page in the photo book. That placed a .png file of each screen shot on my desktop. I then opened each one in Preview and saved the .png file as a PDF. When they all were saved as PDFs, I opened one of them in the Preview app. Preview opened, displaying the photo. I then disabled Hide Side Bar and enabled Thumbnails and Continuous Scroll. I dragged the rest of the PDFs into the Preview sidebar. That displayed the PDFs as thumbnails in the Preview sidebar. I then exported them as a continuous scroll pdf to my desktop.

It turned out great. I didn't notice any difference in quality. If some of the photos export as rotated in the PDF, you can select them in the PDF sidebar and do a Tools/Rotate to correct it. As I said, however, there probably is some app out there that can save as a PDF with one click, like the former Apple Photo Books could in the Photos app.
-- Rich