Steve Young signs Cache Robinson's helmet as Cache's mother Lindsay holds him at Deseret Book in Salt Lake City on Tuesday, Oct. 25, 2016. Young was also signing his book "QB: Beyond the Spiral."
Steve Young's recently published autobiography, "QB: My Life Behind the Spiral," Houghton Mifflin Harcourt, $30), started out as a personal family history project.
The idea came one day when Young's 10-year-old son recounted a story he'd heard at school involving his father and former San Francisco great Joe Montana. But the story wasn't true, Young said, and he realized there was a "ton" that his four children didn't know about him.