The Secrets We Keep by David Horne

Curtis Holmes is a secret agent, in the employ of Cicada, Britain’s first and only foreign intelligence service. After botching a top-secret reconnaissance assignment in Hong Kong, Curtis is invited to participate in the Cicada One Hundred, the newest and best, joint-service combat simulation. But Curtis isn’t alone; along for the ride are the best of the best, including Hartley Erose, Curtis’ long-time best friend and an American agent.

Not that its common knowledge, but Hartley and Curtis have been lovers in secret for years. But this time is different. This time, Curtis is going to have to decide what’s important to him and his life. And the decision that he makes could affect him for years to come.