*HA02, Discovery and Commitment: A Guide to College Writing, Brief Edition, Leonard J. Rosen(Expository Writing Program/ Harvard University), H7126-9, 660 pp., 7 1/2 x 9 1/4, 0-205-17126-5, paperbound, 1995, $22.59nk, December*/ DISCOVERY AND COMMITMENT is a full writing guide with readings that focuses on critical thinking and reading as basic to forming and developing ideas for college-level writing. The readings serve both as examples for college writing occasions and as sources to spark discovery and commitment to writing ideas.