not enough for GREsub
I studied for 2 weeks and I was so frustrated when I walked out from the test room.
I heard that this book included at least 90% knowledge for GRE psy but it has not.
Those who plan to take sub test, I highly recommend you going back to ETS official test content to check all the knowledge on that and learn more stuff.
I think I have to take the test again. :(