Kinder/Jugendliche: ThrillerChris Ryan × Agent 21 - Dead End Chris RyancbteBook2016 Agent 22 - Undercover Chris RyancbteBook2016 Agent 21 - Survival Chris RyancbteBook2015 Agent 21 - Codebreaker Chris RyancbteBook2014 Agent 21 - Reloaded Chris RyancbteBook2013 Agent 21 - Im Zeichen des Todes Chris RyancbteBook2012