PDF works on any device with a PDF reader. Keep in mind that the PDF eBooks we use are letter sized pages and might be difficult for small screens like phones.
Download PDF from the Download section of your Profile page. Simply select the 'Download' link next to the PDF version of the eBook. This will place a copy of the eBook in your downloads folder (or the location you have chosen for downloads on your computer).
You can download a free PDF Reader from Adobe if you do not currently have one.