Oh, there are many good Buddhist books by many authors ... and one should read them, learn from them ...
But the "end all and be all" book of Zen is written by you in this moment on the open page of emptiness ...

Oh, sure, one is handed the Karma and other conditions of the story heretofore ... and we may not always find ourselves in the place we would wish ... but what happens from this instant is greatly up to our choices right here, our words, thoughts and acts. One can thus choose to write a tale of greed, anger and ignorance ... or Wisdom and Compassion ... as you will.
That is the "be all and end all manual", ever beginning and ending in every step and breath, without beginning or end ...
Gassho, J