We have PDF files and we want EPUB to be created.
We have 4 individual PDF files of:
1. cover image,
2. the next page that should come after the cover image,
3. Then the preface
4. Then 11 chapters document
You need to create one EPUB file containing these.
We tried to use the free PDF to EPUB tools and they worked very nicely, except that the linebreaks are used exactly like PDF.
It should be free flowing like in EPUB. So, maybe you create EPUB from free tools, then unzip the EPUB, combine and fix the htmls, zip and finalize the ePub.
Attached is the sample of the PREFACE pdf.