how do you say ‘mentor’ in spanish?

i wrote a small book on mentoring back in 1999, which i keep forgetting about [that’s because i really wish i’d written this book, which is a remarkable book if you’re really serious about developing mentoring as a ministry]. The Australian version of my book got revised and re-published in the USA last year, and the US publishers just emailed to say that they’re doing a Spanish translation for release in 12 months time… !