Agent 21
Agent 21, by Chris Ryan – [pseudonym of Colin Armstrong] Agent 21, #1 – Published: 2010
Colin Armstrong
Stand By, Stand By
Stand By, Stand By, by Chris Ryan – [pseudonym of Colin Armstrong] Geordie Sharp, #1 Published: 1996
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Agent 21, by Chris Ryan – [pseudonym of Colin Armstrong] Agent 21, #1 – Published: 2010
Stand By, Stand By, by Chris Ryan – [pseudonym of Colin Armstrong] Geordie Sharp, #1 Published: 1996