Loved this book - tried not to read more than one section per day.
This is the Diamond sutra that really gets into the philosophy of signs and language. Having studied this in college, I found it very compelling in this interpretation of reality.
I'd thought at one time while I was reading this that I was getting the same knowledge from this monk passed down by a messiah figure monk that I had gotten from very sober, stoic white men very unlikely to be embodying the knowledge in the form of wisdom in their lives. Content the same, teacher different, and this teacher is looking beyond the knowledge to the impact and how to live the wisdom rather than just knowing and storing the information.
In any case, "if the table is a table, then it's also not the table, because it is solely comprised of non-table things, and as long as we know that it's not the table, then we can call it a table," - if this is intriguing to you at all and the metaphysics of reality is interesting to you, and you don't mind some superficial religious undertones (although the book is easily read in a purely secular interpretation), then I'd highly recommend.