The Young Adventurers At Holiday House is the first book of The Young Adventurers series written by Enid Blyton, also known as The Riddle Series.
Nick (Pat) and Katie (Mary) are sent to stay at Holiday House as they recover from illnesses. While at the house they see a light shining from an abandoned house and discover that there are secret passages from a cave and within Holiday House. They also solve the mystery of thefts occurring at the Holiday House.
It begins with twins, Pat, short for Patrick and Mary, having been ill. Between them, they’d had one broken arm, sprained ankle, chicken pox and measles and so in true Blyton fashion their Mother arranges for them to go to Holiday House, a place by the beach in Devon, run by a Mrs Holly, whilst she and her husband take a trip to America.
Mother puts them onto the train, instructing the guard to keep an eye on them, and we learn that the journey takes quite a while until the children finally arrive at the seaside and are met by Mrs Holly herself and her daughter Ruth.
