### 3.1.3 Multiple output files from one input file

If you want multiple output files from the same ‘`.ly`’ file, then you can add multiple `\book` blocks, where each such \book block will result in a separate output file. If you do not specify any `\book` block in the input file, LilyPond will implicitly treat the whole file as a single \book block, see File structure.

When producing multiple files from a single source file, Lilypond ensures that none of the output files from any `\book` block overwrites the output file produced by a preceding `\book` from the same input file.

It does this by adding a suffix to the output name for each `\book` which uses the default output file name derived from the input source file.

The default behaviour is to append a version-number suffix for each name which may clash, so

>     \book {
>       \score { … }
>       \paper { … }
>     }
>     \book {
>       \score { … }
>       \paper { … }
>     }
>     \book {
>       \score { … }
>       \paper { … }
>     }

in source file ‘`eightminiatures.ly`’ will produce

- ‘`eightminiatures.pdf`’,
- ‘`eightminiatures-1.pdf`’ and
- ‘`eightminiatures-2.pdf`’.

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#### LilyPond — Notation Reference v2.18.2 (稳定分支).