Two plays- in book form — with a preface by the playwright, best known perhaps for Two for the See-Saw. The first closed promptly; the second was a hit. But Gibson is a writer to be reckoned with and the publication of his plays insures a measure of permanence in the record. His preface states the case for the serious dramatist- in that he knows the source of his inspiration and can take the results with philosophical detachment. This for the audience away from Broadway- accustomed to getting their plays from the printed page.