What are the five best Kim Stanley Robinson novels?
1) Aurora - a unique and depressing take on interstellar colonization.
 2) The Years of Rice and Salt - the Iroquois team up with a samurai warrior in the 17th Century.
 3) Red Mars - the descriptions of life in the early days of Martian colonization are fascinating. 
 4) 2312 - after reading this book, you will want to live inside an asteroid. Somehow, Kim Stanley Robinson turned space into 1970s Berkley, CA.
 5) The Ministry for the Future - a scary but very hopeful book about global warming.