Book excerpt: There are over seven million horses in America -- even more than when they were the only means of transportation. Nir began riding horses when she was just two years old and hasn't stopped since. This is her funny, moving love letter to these graceful animals and the people who are obsessed with them. She takes us into the lesser-known corners of the riding world and profiles some of its most captivating figures, and speaks candidly of how horses have helped her overcome heartbreak and loss.