CALIFORNIA, 1850. Penny is a blue-eyed palomino paint mare with a taste for adventure! She and a boy named Jesse search for gold in the hills of Northern California. After striking it rich and then losing everything, Jesse and Penny join the Pony Express. The job is a tough one, but Penny loves a challenge! Here is Penny's story . . . in her own words. Love horses and history? Don't miss the stories of Elska, Bell's Star, Calvino, Lily, and more in the Horse Diaries series!