The River of Adventure by Enid Blyton

This narrative excerpt follows a family, including children and their pet parrot Kiki, as they embark on a river trip. Initially presented as a convalescent holiday following illness, the journey quickly becomes an adventure when they encounter suspicious individuals, including a snake-charmer and a mysterious man named Raya Uma, who seems interested in their father, Bill. The children, along with a local boy they rescue named Oola, navigate through various locations, including a temporary film set called Ciné-Town, and eventually discover a hidden ancient temple filled with treasure. Their journey involves close calls with dangerous characters, the use of hidden passages, and the eventual capture of Uma, who is revealed to be a treasure hunter disguised as an archaeologist. The children's resourcefulness and the accidental help of Oola and a harmless snake prove crucial in resolving the conflict and ensuring their safe return and the safeguarding of the discovered artifacts.