I truly admire Alan Watt's, the self described "entertainer". He was truly more than just an entertainer, but his speaking voice and deliver had much to do with his success in communicating ideas. He put you in a trance (i left out ZEN here, it was too easy).
If your not familiar with the man (and you sure as hell should be you rascal) you can find many of his lectures on youtube (in which people put his lectures over some new-agey images which you can disregard) or in audiobook form (this is one of my favorites). I recommend listening to him more than reading his books. It's his delivery + the ideas that make it all worthwhile.