Empfehlungen basierend auf "The Three Investigators in the Mystery of the Two-toed Pigeon"

'This summer the Five will become six--and George isn't happy about it. American girl Berta has been threatened with kidnap, and Kirrin Cottage is the only place she can hide. But Berta's arrival puts them all in danger when someone starts spying on them from Kirrin Island. Berta may be in disguise, but can they keep her safe and protect her from the kidnappers?' -- Back cover.

'Just as the Five are relaxing into the holidays, a burglar breaks into their uncle's study, searching for top-secret documents! And when George and Timmy mysteriously disappear, Julian, Dick, and Anne must track them down. Is the burglary linked to their disappearance--and what dangers must they overcome to find them?' -- Back cover.