The release date, I guess, is today.
For now, you can only get it from:

1) http://www.thereturnofsf.com/ (using PayPal)

2) Sending a US$17.94 ($14.95 + $2.99 s/h) check or M.O. to:

Dejohn Enterprises
P.O Box 2058
Peekskill, NY 10566

3) Or at the end of the month, one of these 4 bookstores in New York City. (Online and mail orders get it early, as part of this exclusive promotion on this site.)

It is not yet available on Amazon.com.