It is a rarity to stumble upon a text of this sort perchance. Not only does the author logically and methodically cover a wide range of topics of interest to any exobiologist or prebiotician, but does so in a way that is sober and well founded. Not once is a leap of faith required of the reader for each argument has stolid footing. I highly recommend this text was an accessible yet thorough treatment of extraterrestrial biology and the origin of our own planet. Having said all this, I hope to see a third edition with the prerequisite updates due to new research as a partial, if not complete, rewrite of the last third of the book. This rewrite is necessary in order to elevate the relatively weak ending to the par set by the previous 2/3rds of the book.