can it read pdf files
Short answer: Yes. Long Answer: PDFs are tricky beasts and depending on what the pdf is it will look okay or look weird. Scientfic pdfs filled with formulas and such might look strange if zoomed in/out. YMMV.
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Go here www.pcworld.com/article/245890/sony_reader_wifi_pr... press ctrl + f type pdf then read. Or go here store.sony.com/webapp/wcs/stores/servlet/ProductDi... and read the specs. Good luck.