Joseph P. Farrell earned his doctorate in patristics from the University of Oxford. Since writing numerous theological books, he has authored books on physics, alternative history and science, and other "strange stuff". Each PDF ebook is uniquely coded to your purchase. We off...read moreer no technical support, since PDFs simply do no require it; if you have problems with your PDF reader (e.g. Adobe), you must contact that provider - we cannot troubleshoot personal computers or devices. Likewise, it's the buyer's responsibility to save the PDF files in a place where he can find them when needed. You will not be accessing the PDFs continually from an online source, but storing them on your own device. Make a backup copy.