study material for 640-801

CAN ANYBODY PLEASE TELL ME WHERE I CAN STUDY FROM FOR THE 640-801? I missed 607 by one persent. got 836. i heard todd lammle's book will come in this month end? will that be sufficient?
i had got 100 in all but one mocks of Boson Tests and Cisco. I do not know where i went wrong. it feels horrible.
please help somebody. My placement is on stake.