Sentence:  Ever since Bambi , and , more recently , Born Free , there have been a lot of <WSD>books</WSD> about animals , but few compare with Max Fink 's wry , understated , charming , and immensely readable My Friend , the Quizzical Salamander . 
Meaning of the word marked with <WSD> tags:  a written work or composition that has been published (printed on pages bound together)