Kaplan GMAT 800 prep book, debrief by a 770 scorer – GMAT Club Published December 29, 2008 by dzyubam 0 Find out what how other people review the Kaplan GMAT 800 prep book. Read more. Read a debrief by a 770 (Q50, V46, AWA 6.0) GMAT scorer. dzyubam Published in GMAT GMATKaplandebrief