After reading Green Mars, I couldn't wait to see how the trilogy turned out. Alas, I was disappointed. Robinson seems to have fallen in love with his vision of the future, and describes it in great and glorious detail, but doesn't seem to DO anything in this new environment he's created. I admit I like novels with action, and these endless descriptions bored me, so perhaps others have a different opinion. I could see the value in describing Mars in such detail in the 1st book of the series, to set the stage. And scientifically it was interesting, as I don't know much about Mars except what appears on The National and in Time Magazine. But scientific interest isn't satisfied with speculation about how Mars might look (in minute detail) after several decades of terraforming. A tedious ending to what otherwise was an interesting and entertaining series.