Instruct: Classify the given Amazon review into its appropriate rating category
Query: Finished!

This was a Barely Serious Book Club selection. I would not otherwise choose science fiction published in 1969. A challenging read. No one at dinner had completed reading the book except the member who chose the book. She explained its significance in the evolution of sci-fi and some of the plot so I picked it back up. The incredible journey of the two main characters across the ice that also leads them to understand each other is truly epic. I read for pleasure and escape. This book while worthwhile required a lot of effort.