The two (or more) worlds of Peter Pennoyer, an architect and historic preservationist, converged a few weeks back at an Upper East Side book party for "New York Transformed" (Monacelli). The monograph celebrates the architecture of Cross & Cross, a firm that made its mark on New York City's architectural landscape during the 1920s and 1930s. Mr. The stories, written with what Michiko Kakutani of the New York Times described as