Charles Dickens should be alive today. His still remembered novels were published in tabloid form, a chapter at a time. He would probably approve of the first book to be published on Tweeter, 140 or fewer characters. The novelist is Jennifer Egan, who is no stranger to readers of American fiction. (And very easy on the eyes; we should get that out of the way). She takes fiction form to its limits with the tweet novel. Interesting.