In the period since the original four volumes of Phillip Griffiths s Selecta were published Selected Works of Phillip A Griffiths with Commentary Parts 1 4 Collected Works Volume 18 Griffiths has continued to produce beautiful and important work The current two part publication brings Griffiths s Selecta up to date by including the majority of his recent articles as well as two older papers on differential geometry whose length had precluded their inclusion in the original Selecta The papers are organized along the three main topics Differential Geometry and Hodge Theory Part 5 and Algebraic Cycles Part 6 In addition to his papers Griffiths has been an author of a number of research monographs To give the reader an overview of what these monographs contain introductions to some of these are also included