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Omnibus edition


An omnibus edition or omnibus is a work containing one or more work by the same or, more rarely, different authors. Commonly two or more components have been previously published as books but a collection of shorter works, or shorter works collected with one previous book, may be an omnibus.

Omnibus editions help consolidate longer series into fewer books. The prices are usually equal to or less than the price of buying each individual edition separately.


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Wikipedia

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