The Fate of Fenella, by Helen Mathers and 23 Others.

Mathers, Helen et al.  The Fate of Fenella.  (1892) Kansas City: Valancourt, 2008.
I’ve included this novel in my alternating narrative project, not because it is multi-focalized, but because it has multiple authors–24 of them (and thus offers an adult comparison with a YA novel like Click).  It was a project initiated by a publisher, who [...]

Click

Park, Linda Sue, David Almond, Eoin Colfer, Deborah Ellis, Nick Hornby, Roddy Doyle, Tim Wynne-Jones, Ruth Ozeki, Margo Lanagan, and Gregory Maguire. Click.  New York: Scholastic, 2007.
Ten authors each write a story that connects in some way to the other nine stories–but the ways are many and diverse.  It happened, according to a Booklist review [...]