Book of Imaginary Beings was written by Jorge Luis Borges with Margarita Guerrero and published in 1957 under the original Spanish title Manual de zoología fantástica.[1] It was expanded in 1967 and 1969 in Spain to the final El libro de los seres imaginarios.[citation needed] The English edition, created in collaboration with translator Norman Thomas di Giovanni, contains descriptions of 120 mythical beasts from folklore and literature.