In the Buddhist religion, the Dharma concept of the Buddha is not confined to men, but is taught to all kinds of beings, including ghosts and animals. According to a legend Avalokitesvara, the Bodhisattva of mercy, had taken among the birds the form of a cuckoo, an animal which recommends itself to the Buddhist mind by its attitude to family life. The present book constitutes an English translation of the Tibetan original. In his introduction, Dr. Conze not only sketches the background of the story, but gives extracts from another tibetan work, originating from the Kagyudpa school of Milarepa, which describes the spiritual antecedents of the cuckoo. The book in spite of its deep content makes a pleasent and easy reading. As a work of popular interest, it should be welcomed by scholars as well as by general readers interest in Buddhist literature.