TheCodeBreakershaveahappyreunionwithStephie,theirfriendfromHongKong,thatis,untilsheismysteriouslykidnappedonenight.Whatareherruthlesskidnappersafterandwhydoeseverythingresembleacomputergame?WillTheCodeBreakersbeabletoconquertheeerieGatekeeper’’schallengeanduncoverthesinisterplot?JoinTheCodeBreakersastheytackleexcitingpuzzlesthatleadtodeeperinvestigationandintrigue!Matthew,BellandJimmyhavealwayslovedMaths.Littledidtheyknowthattheirhobbywouldeventuallyleadthemtoworkwiththepolice,takethemtodifferentcountriesandmeetwithallsortsofdangersthatwouldtestthemtotheirlimits!EachbookintheseriesisanewadventurethatinvitesreaderstohelpsolveMathspuzzlesandcodes,togetherwiththethreefriends.Solutionsareprovided,andthestoriesalsocomewithinterestingandeducationalfunfactstograbtheinterestofreaders.