Never before has the need for effective mentoring programs for principals been more urgent. Record student enrollment, an anticipated retirement of about 40 percent of principals, and a shrinking pool of those who aspire to be principals have brought about a shortage of principals and an alarming lack of qualified applicants. This research roundup summarizes five literary resources useful in addressing this situation: "A Step into the Principalship" (Gary Bloom and Marty Krovetz); "The School Administrator Handbook: Leading, Mentoring, and Participating in the Internship Program" (Ronald L. Capasso and John C. Daresh); "Leaders Helping Leaders: A Practical Guide to Administrative Mentoring (Second Edition)" (John Daresh); "Albuquerque Principals Have ESP" (Carl J. Weingartner);"The Mentor's Guide" (Lois J. Zachary); and "Getting Personal: New York City's District Two Puts Priority on Principals" (Liz Willen). (RT)