In her new memoir, Amy Duggar King opened up about the abuse her mother, Deanna, allegedly experienced at the hands of her own father. "Grandpa Duggar was a complicated man. ... He was off- the-wall, unpredictable, reckless, and practically a real-life Kramer from Seinfeld," Amy, 39, wrote in her book, Holy Disruptor: Shattering the Shiny Facade by Getting Louder With the Truth, published Tuesday, October 14. Though Amy's grandfather Jimmy Lee was "hilarious," she admitted he was also "possibly a little insane.