The Tourist is an espionage novel written by Olen Steinhauer in 2009, that was featured …
Review of 'The Tourist (Milo Weaver #1)' on 'LibraryThing'
The 'tourist' is a CIA operative who has retired from the field only to be swept into it again to defend himself. I'm afraid I like the author's East European series far better, but I'm glad for his success with a more mainstream novel.