Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Author of interesting book sells out for cash?

An interesting book that follows the trials and tribulations of a gay man attempting to adopt a "problem" child within the California Adoption System. A Fascinating read and I had actually just finished the book when I noticed that the movie version was playing on "Dish". So I thought I'd give it a look-see. This very enjoyable book has been ruined by the changes made by the producers and I assume the author to the extent that the movie has nothing to do with the book. A cast of "B" actors including (ooooh won't it be cute if we cast a REAL brother and sister John and Joan Cusack PLAYING a brother and sister in the movie---GAG! Too bad they couldn't find a "real" brother and sister who could also act. Well I hope the author made a nice pot of cash and it will make up for the fact that for the rest of his life people will think of the movie rather than the book when they see the title "The Martian Child".