Since the advent of eBay, this book is much easier to find than when I wrote this. The book also looked at Secretariat's first foals, including General Assembly. My review originally appeared on Amazon.com in 1997:
No, not the title of the next Robert Ludlom bestseller, but about the first two years of the superhorse Secretariat's stud career (1974 and 1975). Also includes a photo of Secretariat doing his new job. A fascinating look at the business of breeding racehorses that focuses on the horses a good bit of the time. I only read this book once at a library I worked at nearly ten years ago and still recall it vividly. Good luck finding it--before the advent of the Internet, this was one of the most obscure books you could get.
Here's the best image of the cover I could find on the Internet as of January 5, 2017: