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Published Books
As a final resource, you can choose from a large collection of reference books for Python. Bear in mind that books tend to lag behind the cutting edge of Python changes, partly because of the work involved in writing, and partly because of the natural delays built into the publishing cycle. Usually, by the time a book comes out, it’s three or more months behind the current Python state. Unlike standard manuals, books are also generally not free.
Still, for many, the convenience and quality of a professionally published text is worth the cost. Moreover, Python changes so slowly that books are usually still relevant years after they are published, especially if their authors post updates on the Web. See the Preface for pointers to other Python books.
