Although not due for release until March, the book has been listed on Amazon for more than a month; apparently this is not uncommon, as word of upcoming publications propagates through various distribution channels.
So I'll go ahead and announce it officially: the book is available for pre-order on Amazon.
The inscription on Hakuin's self-portrait gracing the cover reads:
Within the meditation hall
I am hated by the thousand buddhas.
In the company of myriad demons
I am despised by the myriad demons.
I crush those who practice false Zen,
and annihilate those blind monks
who can't penetrate Mu.
This evil, worn-out shavepate
adds one more layer of ugliness to ugliness.