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One of the most famous and interesting novels by Emilio Salgari!

Everyone has heard of Yalla, a brave and ruthless warrior. She led an Indian tribe when white people came to her land. It is said that Yalla was once betrayed by her beloved Devandell, and now she dreams only of revenge. Devandell's only hope for salvation is his old friend John Maxim and two daredevils named Harry and George. Exotic journeys and dangerous battles await the friends... It is here, in the Far West, in the land of free and brave people, that extraordinary adventures begin.