Táto séria sleduje napínavé dobrodružstvá tajného agenta, ktorého identita je zahalená tajomstvom. Každý diel prináša nové, globálne hrozby a zložité misie, ktoré preverujú nielen jeho schopnosti, ale aj morálku. Čitatelia sa môžu tešiť na rýchly spád, nečakané zvraty a pútavý svet špionáže a intríg.
The Sidebottoms, the nightmare neighbours of all time, have moved! Moved in next door to Ben's family... For the gang, Ben, Barney and Jenks, this is a state of emergency and calls for the one and only mighty Agent Z and a penguin...!
More mischief from those practical jokers, the Crane Grove Crew, by the author of the bestselling The Curious Incident of the Dog in the Night-Time .Ben’s repulsive cousin, T.J., comes to stay. He discovers an incriminating videotape of Agent Z activities and blackmails Ben into becoming his slave. Meanwhile, Ben, Jenks and Barney embark on their first film, entitled Invasion of the Killer Bananas. When T.J. disappears, however, the film points towards Ben, Jenks and Barney as murder suspects! In an attempt to clear their names, the boys use all the cunning of Agent Z to try and lure T.J. home and into the hands of the police…