Download as ePub or Mobi Experimentally, we are providing ePub and Mobi files for this issue. The quality of the display will vary according to the device or software you use. Please post comments if it works (or if it doesn't). ePub format Tested on a Kindle. Mobi format Tested on an iLiiad. FB2 format Tested in FBReader. In both cases, the conversion was done using Calibre PDF Download PET is av