One of my newer favorites is another book by Barbara Hand Clow called Alchemy of Nine Dimensions - Decoding the Vertical Axis, Crop Circles, and the Mayan Calendar 2004.

In this one she follows up on much that was started with her book The Pleiadian Agenda - A New Cosmology For The Age Of Light 1995. Personally I really like what I call "whole brained" people. People who have access to and use both their right and left brain hemisphere's like in the good ol' ancient days. And, because of this can give you a well rounded take on 'reality'. B. H. Clow excells at this.

This book deals with multidimensionality, string theory, sacred geometry, crop circles and much more. Plus at the beginning of each chapter, there's a great and easy meditation (to access each of the 9 dimensions) by her husband Gerry Clow. Excellent well rounded book IMO.