/usr/share/doc/libedata-book-1.2-20/changelog.Debian.gz is in libedata-book-1.2-20 3.10.4-0ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libedata-book-1.2-20/../libebackend-1.2-7/changelog.Debian.gz