I thought I would mention that David M. Harland, author of:

Exploring the Moon : The Apollo Expeditions
http://www.amazon.com/exec/obidos/ASIN/1852330996/qid=1004221787/sr=1-1/ref=sr_1_10_1/002-1164585-7884813

Jupiter Odyssey : The Story of NASA's Galileo Mission
http://www.amazon.com/exec/obidos/ASIN/1852333014/qid=1004221787/sr=1-2/ref=sr_1_10_2/002-1164585-7884813

has a new book currently in press (to be published in November 2001):

The Earth in Context: A Guide to the Solar System
http://www.amazon.com/exec/obidos/ASIN/1852333758/qid=1004221787/sr=1-3/ref=sr_1_10_3/002-1164585-7884813

Dave was kind enough to send me an advance complimentary copy for the small contribution I made in helping review two chapters (Mars and Mercury) prior to submission to the publishers for final printing. It should be noted that Nick Hoffman, who also contributes here, extended his help in the review process as well, and we are both mentioned in the Acknowledgements section. At any rate, I'm recommending the book to anyone, especially those who are of beginning-to-intermediate level, and who is interested in a detailed (abundantly footnoted), yet easy-to-read work on comparative planetary geology that will serve as an entree to the works published in the peer-reviewed literature.

Alex R. Blackwell
University of Hawaii