Tyrannosaur Canyon

At the start of this improbable thriller from bestseller Preston (The Codex), innocent bystander Tom Broadbent is riding his horse through a New Mexico canyon when he comes upon prospector Stem Weathers, who's just been shot. Before Weather dies, he gives Tom a notebook filled with mysterious numbers, asking him to pass it on to his daughter. Taking this assignment to heart, Tom puts himself and his wife at ever greater, more pointless risk as he tries to deliver the notebook.