This is a wonderful study - not completely spiritual and not completely academic/scholarly. It's an attempt to locate Dongshan's idea of suchness - also could be called emptiness - in the Chinese Chuan Buddhist tradition. Really well researched and the historical sketches of the different books, people, thoughts, and eras leading up to and going past Dongshan were masterfully done. You get a very easy and good feel for his place in history. But the thing that sets this book apart is the expert criticism by the author of the texts, bringing up multiple translations and cultural interpretations that are present in the text as well. This expands your understanding of the writing, the poem, or the koan that Leighton is discussing. I love historical studies of the lives of monks and masters so much, and I wish more of them were written like this. I have a really great sense of Dongshan's place now in his own time, in history, and in Zen theology.