Reddit reviews Hsin-Hsin Ming: Verses on the Faith-Mind

You could check out the Hsin Hsin Ming, but there are some issues with relying on only a single text. If you treat it as an explanation of your own life, and then bring your own ideas into it, you end up with a modified version of your own ideas, which isn't what Zen talks about.

So, I'd recommend you try and read many different authors that talk about the same thing, in the form of Zen Essence, or just by buying a bunch of different Zen Master books and studying until you see the common theme outside of words.