This Handbook is a practical guide to mentoring. It does not tell you exactly what to do and how to do it. Rather, it is like a (travel) guidebook: you use it to acquaint yourself with general ideas and concepts, and then pick the pieces that you think serve you best. Mentoring requires mutual consent and collaboration – this Handbook is merely a resource for colleagues to use as they together think best – or not at all. We hope you find it useful.