I’ve came across with this article Why PDF Is Not An Ebook Format, the article was written 4 years ago. PDF (Portable Document Format) is the most commonly asked eBook format, in fact there are many websites that offers free PDF ebook downloads.
The article above said, “PDF is one of the reasons ebooks have been so slow to catch on with the majority of the reading public; readers that have tried reading PDF files on screen have concluded that ebooks are hard to read.” I disagree and agree.
I disagree that pdf is slow to catch readers, PDF is still the most requested eBook format primarily because mostly PDF readers and eBooks are free to download. A simple googling search, you’ll find a lot of PDF eBook download sites. If you happen to browse eBook forums, you’ll notice that many are still looking for PDF formats. PDF is electronic transmission format for paper documents, it is the perfect format for printing, if you’re still the conventional reader. I’ve encountered many such bookworms from my old mobile blog, they choosed to have it printed and read it the traditional way.
I agree that its really hard to read PDF on mobile but I still prefer PDF format as my source format for conversion. Converting and making it eye friendly on my mobile is my primary concern.