I'm hoping to convert an online book to pdf form. I was hoping to use PHP to loop through all of the pages, convert to pdf, then merge them. After doing some internet snooping, I came across pdfcrowd.com which looks like it might be a good possibility for the conversion aspect, as I can actually integrate it using PHP. My question is whether anyone has used this particular service, and whether there might be a better (cheaper?) solution/method to investigate.