- You can't open a PDF in InDesign
- You can place a PDF in InDesign, but this would only export images for an EPBUB, not convert it to an EPUB.
- If you are not the owner of the PDF you are not allowed to convert it in any electronical form.
How can I place a PDF in Indesign?
If I export images for an EPUB, Ican read it on my ebook?
Do you have permission from the publisher? When you negotiate copyright clearance and fee in these cases, you should stipulate that you will be sent original unprotected files. No permission? Stop!
Place as any image, but do what Test Screen Name told you to do.