Create Online PDF Reader w Highlight & Bookmarking

Hello ▬ We are a small publishing company in Portugal ▬ We run a small eBook sales website ▬ Now when eBooks are downloaded the customer simply gets the PDF file ▬ We want to offer them a single page with a neat PDF reader which will allow them to do 3 main things: Read the Book, Bookmark a page, Highlight lines of text with different colors Can you do this ? Explain how, we are ready to hire asap Thanks Agostinho