Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Terrific! One of the best of the series

Excellent book. Isaac Asimov ties together the Foundation series with his Robot books and his Empire books. He makes many allusions to those earlier books, even bringing back R. Daneel Olivaw, now 20,000 years old! Continuing the storyline in Foundation's Edge, he examines the conflict between individuality and unity, with the extreme unitists of Gaia, the extreme individualists of Solaria (who have even become hermaphrodites to totally eliminate interaction) and the moderates of the Galaxy. This book has intellectual excitement, some adventure, a bit of romance, and some philosophy. This is definitely one of his best