In the world of Buddhism only the words of the Buddha and the life of Hui-neng are sutras. If thats not a good enough reason to get this then get it because Hui-Neng was a beautiful man and a great teacher. an illiterate woodcutter he became enlightened by just hearing a phrase from the Diamond sutra. he later worked in a monestary hidden away because the master knew if others knew of his great achievement they'd probally kill him but aventuallly he not only became the 6th patriarch but a great teacher and one of Zen's most beloved ancesters.
Hui-Neng has been known as one of the fathers of Zen and his sutra shows why. Absolutely splendid, if you put down this sutra I question your health. Meant for the person with a background in Zen, but not a bad starter if you approach it with an open mind and neither approve nor dissaprove of a word in it.