Iowa City Book Festival's twitter novel unfolds this weekend! Follow @NovelIowaCity or help write the book with #icbfn tweets. Novel Iowa City begins at noon today -- multiple authors writing a single novel, 140 characters at a time, simultaneously using Twitter. Everyone is welcome to contribute to the novel -- simply tweet your contribution and use the tag #icbfn. Watch the novel unfold on Twitter at @NovelIowaCity, or online at the Novel Iowa City website.