Tarzan and the Lion Man

Tarzan and the Lion Man Edgar Rice Burroughs - Tarzan and the Lion Man is a novel by American writer Edgar Rice Burroughs, the seventeenth in his series of twenty-four books about the title character Tarzan. The novel was originally serialized in the magazine Liberty from November 1933 through January 1934. It satirizes Hollywood's treatment of the Tarzan character and even spoofs Burroughs' own work.
It was written at a time when Johnny Weissmuller was becoming a movie star by playing Tarzan as an illiterate character, to Burroughs' open displeasure. Tarzan and his lion companion Jad-bal-ja discover a mad scientist with a city of talking gorillas. To create additional havoc, a Hollywood film crew sets out to shoot a Tarzan movie in Africa and brings along an actor who is an exact double of the apeman but is his opposite in courage and determination.
Later, as John Clayton, Tarzan visits Hollywood to find himself in a screen test for a role in a Tarzan movie. He is deemed unsuitable for the lead role because he is "not the type."A great safari had come to Africa to make a movie. It had struggled across the veldt and through the jungle in great ten-ton trucks, equipped with all the advantages of civilization. But now it was halted, almost destroyed by the poisoned arrows of the savage Basuto tribe.
There was no way to return. And ahead lay the strange valley of diamonds, where hairy gorillas lived in their town of London on the Thames, ruled by King Henry the Eighth. Behind them came Tarzan of the Apes with the Golden Lion, seeking the man who might have been his twin brother in looks -- though hardly in courage!