How many ebooks are there?
But seriously, after about 4+ years of switching to mainly reading ebooks, I've only amassed a little more than 500 ebooks. The majority I've already read -- I don't really stockpile that much. Plus I cull my TBR "freebies" pretty regularly. Some books I just
know I'm never going to read, so I don't hesitate to release their bits back into the ether.