I highly enjoyed Aldous Huxley's and Alan Watts' books on Philosophy : for example, Huxley's The Divine Within and The Perennial Philosophy and Watts's Become What You Are, This Is It, The Book, and Behold the Spirit.
Both writers are highly intellectual and their theme is more or less the same. Huxley writes elegantly and absorbs the reader and makes valid points. Watts, on the other hand, writes very simply and tells it like it is. No beating around the bush.
Question: Can anyone recommend any similar authors to these two on the subject?