Referential use lends itself to online searches and research, rather than cover-to-cover reading, even on a Kindle or Nook. There is indeed a narrative story -- mine -- with its own ironies, which have tended to accumulate since I last published a book (2002)/
Update: Oct. 28, 2013
Tim Lee of the Washington Post pointed out this op-ed in the New York Times by Tim Kreider Sunday, "Slaves of the Internet, Unite!", link here. Kreider sometimes takes being asked to contribute a complementary piece to a publication as an insult, and toward the end of the piece, insinuates that writers who give away content for free make it harder for other writers to make a living at it. I think a lot of cultural tension is building up over this. I was even asked by someone who knows me well in early 2008 why I was competing with his site for "free" attention.
Lee tweeted that getting large exposure to readers is itself a privilege, and money is just an extra reward when appropriate (when people want to pay).
I have a feeling that Kreider has yet to watch "Reid Rainbow" scream "It's free" (or "I'm free") on his satirical videos, already reviewed on my Movies Blog May 13, 2013.