Paul English accomplished every tech entrepreneur’s mission when he sold Kayak to Priceline for $2 billion. He was set for life, yet figuring out what to do next was a more complicated question than he expected. This hour, we’ll talk about what to do when your dreams come true with Tracy Kidder, who tells English’s story in “A Truck Full of Money: One Man’s Quest to Recover from Great Success” (Random House). Kidder will be in town tonight for an event benefiting the Dallas Public Library.