I picked this book up at a used bookstore, and boy howdy am I glad I did! It's a really wonderful old sci-fi book that doesn't seem dated at all, except perhaps by the overly optimistic and "good" main character, Bill Easson. I thoroughly enjoyed reading this, and feel lucky that I could. If you can get your hands on a book, do so! And hopefully Doubleday or another publishing house will re-issue this.
The basic plot: Life on earth is going to come to an end, and the powers that be can only save one in 300 people. Bill Easson is a spaceship pilot, so he gets to pick 10 people to go with him to Mars...one in 300. In his case, he picks 10 people from a small town of 3,000 - leaving the rest to die as Earth does. Does he pick correctly? Really gripping...I only wish there was more!