DeLOREAN By John Z. DeLorean with Ted Schwarz Zondervan Books. 349 pp. $17.95 HARD DRIVING My Years with John DeLorean By William Haddad Random House. 193 pp. $17.95 WHAT ARE WE TO MAKE OF John DeLorean? For nearly 20 years now, DeLorean has been driving at breakneck speed against the grain of Detroit’s automotive establishment, and nothing — abject failure included —