Most manuals come as PDFs. PDFs are not first class citizens in Apple's "Books". On the Mac, when you open the PDF, it opens in Preview. You can not save a bookmark. On iOS, there are features like adding notes and high lights that you can do with other formats (I guess epub?) but not with PDFs. Last... if I read part of a PDF on the Mac, the page is not synced up with iOS.

From this point, there are so many different choices that it becomes bewildering but lets try to keep using "Books". As a specific example of this quest is this PDF for Canon RF 28-70mm F2 L USM On page 6 (called ENG-5) is an image of the lens with notations.

I've tried three or four different PDF to epub converters including Calibre and in each case, that image is lost. Plus, the general format looks a bit weird but I can handle that. The sample above is just an example I picked.

When converting from PDF to epub, are images consistently lost or is this example unusual? I will try other conversions but thought I would ask ... perhaps there is a common trick or something that I am missing.

Do other readers like Nook on Mac / iOS or Kindle on Mac / iOS handle PDFs better? The key feature is I just want the last page I read kept across all the platforms. Adding bookmarks that sync would be very nice too.

Thank you for your time
pedz