Hi Don, You wrote: Now, time to get back to rewriting Design of Everyday Things. I am my third draft. Maybe this will be the final one, but probably not. For what it's worth, a time and motion study on academic researcher activities I did in 2001 seemed to indicate six revisions was optimal for successful research publications. Strangely, individuals described their revision types differently yet six revisions seemed characteristic. Less than six revisions of whatever type seemed to result in documents that required additional polishing. More than six revisions seemed to be a waste of time. Obviously, working on an existing text reduces the number of revisions needed as does working with a publisher, where their editorial staff do some of the revision. All the best, Terence