8128b6da_tion_Books_and_Video_Resources__EPUB
[Feature] Reflowable text PDFs are written in concrete  remember, theyre based on printed pages, typically 8½ by 11, and (with many PDF readers) they do not reflow when enlarged. This can make PDFs difficult to read on smaller mobile devices. Note: Adobe Reader X and a few other readers give users the ability to reflow text; however, this feature is typically not automatic. [EPUB] 
EPUBs automatically reflow (and hyphenate) and are well suited for mobile devices.
Save a Tree, Read eBooks!, Aircraft Technical Book Company, Aviation Books and Video Resources
EPUB