This book appealed to both my wife and myself. We made time to listen to it beyond our normal listening routine because we found it entertaining, humorous, and actually informative. It does delve deeply into the nature of identity of self and even hints at how a supreme being could be created from us instead of for us. Overall, a very satisfying read. Both my wife and me do not feel the need to listen to the next book in the series, and we felt any thing more would be just Bob showing his ego beyond the point we would be interested in and the next book would just drift into typical science fiction territory.