This might be old news to other collectors but there is currently a book at Barnes & Noble called Concept Cars: An A-Z guide to the world's most fabulous futuristic cars by Chris Rees. (It's in the bargain section). The Isuzu Vehicross has a small blurb and picture on page 53. The rest of the book is kind of cool too although no techical details - just photos with descriptions. It categorizes them all by manufacturer.