/usr/ is in libepubgen-dev 0.0.0-2.
This file is owned by root:root, with mode 0o755.
..
/usr/include/libepubgen-0.0/
/usr/include/libepubgen-0.0/libepubgen/
/usr/lib/
/usr/lib/pkgconfig/
/usr/lib/pkgconfig/libepubgen-0.0.pc
/usr/share/
/usr/share/doc/
/usr/share/doc/libepubgen-dev/
/usr/share/doc/libepubgen-dev/README
/usr/share/doc/libepubgen-dev/NEWS.gz
/usr/share/doc/libepubgen-dev/copyright
/usr/include/
/usr/include/libepubgen-0.0/libepubgen/libepubgen-decls.h
/usr/include/libepubgen-0.0/libepubgen/libepubgen-api.h
/usr/include/libepubgen-0.0/libepubgen/EPUBDrawingGenerator.h
/usr/include/libepubgen-0.0/libepubgen/EPUBTextGenerator.h
/usr/include/libepubgen-0.0/libepubgen/libepubgen.h
/usr/include/libepubgen-0.0/libepubgen/EPUBPackage.h
/usr/include/libepubgen-0.0/libepubgen/EPUBPresentationGenerator.h
/usr/lib/libepubgen-0.0.so
/usr/share/doc/libepubgen-dev/changelog.Debian.gz