The Tourist, written by Olen Steinhauer, is a thrilling espionage novel that takes place in a world of international surveillance and intrigue. The story follows Milo Weaver, a former CIA agent turned tourist, as he is pulled back into the world of espionage to investigate a series of mysterious deaths. As Weaver delves deeper into the case, he uncovers a web of secrets, double-crosses, and high-stakes surveillance operations. This gripping book keeps readers guessing until the final page.