Though Wallace Stevens' shorter poems are perhaps his best known, his longer poems, Helen Hennessy Vendler suggests in this book, deserve equal fame and equal consideration. Stevens' central theme--the worth of the imagination--remained with him all his life, and Mrs. Vendler therefore proposes that his development as a poet can best be seen, not in description--which must be repetitive--of the abstract bases of his work, but rather in a view of his...