Special forces operations, survival and covert missions are the core of Chris Ryan’s adult thrillers and younger action series. His adult novels include Strike Back, which follows former SAS soldier John Porter into a hostage rescue linked to an earlier mission, and the Danny Black series, beginning with Masters of War, about a serving SAS operative moving through contemporary conflict zones. For younger readers, the Alpha Force books follow a group of teenagers using survival and rescue skills in high-risk situations around the world, while Agent 21 moves into espionage. Ryan’s fiction is fast-paced, plot-driven and heavy on operational detail, weapons, escape and fieldcraft rather than psychological introspection. Adult readers will mostly encounter Ryan under military thrillers and SAS fiction, while Alpha Force and Agent 21 provide the stronger links to teen action and espionage in the Robert Muchamore vein. Read more Less