Both new librarians and those changing directions in the field can benefit greatly from a relationship with a positive and supportive mentor. In this anthology, public, school, academic, and special librarians, as well as LIS faculty and consultants, offer expertise and wisdom for those wishing to become a mentor or a protege or those wishing to implement a mentoring program within their library or library association. Topics include philosophical reasons for choosing to enter a mentor relationship, practical tips on setting up a program, internships, practicums, job shadowing, virtual reference, opportunities for those new to the profession and those in mid career, and mentoring across disciplines. By sharing their personal successes as well as their failures in mentoring, the 35 contributors offer sound advice backed by years of experience, advice that will aid all librarians who seek guidance or wish to guide the future of the library profession.