“Written by a Zen Master”
You should read this book, you are importuned, because it was written by a “Zen master.”
That is thought to be a higher commendation than “enlightened person.”
But perhaps it really is not, for every religion has musts, has strictures that constrict. So there can never be
Freedom
– Free!
And Perfect Freedom would logically seem to be the way to Enlightenment.