O'Reilly Media is known for their distinctive book covers, which usually feature a
woodcut of an animal.The animal is often chosen because of its literal ("Programming Python" has a python on its cover), figurative ("JavaScript: The Definitive Guide" has a rhino species native to the island of Java) or humorous (a grotesque toad was chosen for "Windows XP Annoyances for Geeks") connotations.These often follow themes: for example, a camel was chosen for "
Programming Perl" and then a llama (morphologically similar to a small camel) was subsequently picked for the introductory "
Learning Perl".
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