Riot Recommendation: Spy Novels & Thrillers

You know the drill: we pass along requests for recommendation to the greatest book discovery tool in the history of the world: you, dear readers. Here’s our latest request:

I need book recs for a friend – Spy Fiction and Thrillers. Likes Brad Thor and others along that spectrum. Not my thing. Help? #riotrec — Cassandra Neace (@CassandraNeace) March 14, 2012

So, guys…what would you recommend?