15963. "HAMMER-PROOF: A POSITIVE GUIDE TO VALUES-BASED LEADERSHIP" BY JEFFREY A. ZINK (BOOK REVIEW). Zink’s book is concerned with the importance of ethics in leadership and provides a practical guide for leaders who want to attain an ethical stance. In addition to describing Zink’s basic ideas, this review praises his use of a straightforward writing style and explanatory examples, and notes that the works of other writers are supportive of his views. Keywords: business ethics values leaders. Written 2003. 15 pages; 34 footnotes; 9 bibliographic sources. 4,168 words.