The Adventure Series by Enid Blyton, a prolific English children's author, is a series of eight children's novels. These books feature the same child characters: Philip, Jack, Dinah, and Lucy-Ann, along with several adult characters. Jack's pet parrot, Kiki, is also a standard feature in each novel. The stories show the four children off on their own, discovering and solving mysteries without much adult assistance. Although the publication dates span a decade, Blyton reportedly wrote each of the novels in less than a week. The colourful dust jackets and line illustrations were by Stuart Tresilian. Source: Wikipedia (en)