@DoctorOhh
ok, that won't override title/author anymore. may be my idea could be a feature in future
goodreads is also a good suggestion - but sadly it provides only english content...
@Adoby
i have changed my settings as you and DoctorOhh told me. but how do i preview the metadata download? if i click 'download metadata' the window pops up and show me matching entries from the configured providers. but if i click ok the selected entry will be applied without preview and without the chance to disable some of the content...