Lots of FREE GRE books and resources

[seelimdu]

Writing Skills For the GRE/GMAT
Kaplan GMAT, GRE and LSAT 2008 Platinum
Nova's GRE Preparation Book, GRE Big Book Word List
GRE Big Book

Critical Reasoning
Kaplan GRE

Essential notes for GRE

HERE IS ALL (http://bdeconomy.blogspot.com/)

[veda1234]

In addition to all the material you listed this site gives you a edge in improving score in the verbal section
GRE (http://www.vocabularylearningresources.net/GRE.html)