Peggy and her younger twin siblings, Mike and Nora, are living with a harsh aunt and uncle after their parents are thought to have been killed in a plane crash. In this first adventure, aided by Jack...
The children, reunited with their parents again (and Jack now adopted as part of the family),go on holiday at the rugged Cornish coast with a family friend, Miss Dimity, and get drawn into a kidnappi...
Prince Paul, still attending the same boarding school as Jack and Mike, invites his four friends to his palace in Baronia for the holidays; but it is so hot there in the roasting summer that the entir...
Prince Paul's family are visiting England and wish to rent a castle to stay in for several weeks, and Mrs. Arnold has been asked to help locate a suitable castle, knowing England far better than Paul'...
Captain and Mrs. Arnold are flying off in their plane, the White Swallow, and apparently have crash-landed in a remote part of Africa. The children, home from school and in the care of Dimmy, team up...
