If you know anything about it,pls. tell me about it...

black crow ?

Umm…
I know ‘The Black Raven’ is a book by Katherine Kerr, one of a series of books which are in turn part of a larger series. I haven’t read it, I think it’s just your average fantasy epic…

It’s also an old murder mystery film and a German band.

Do you mean ‘Dr Faust’s Threefold Coercion of Hell’? Sometimes that’s referred to as The Black Raven. If you do, it’s a grimoire, supposed to be based on magic used by the German alchemist. A Google search brings up plenty of sites where you can download the text for free.

I’ve just realised that probably wasn’t what you meant, as you’ve posted it in the Cryptozoology section. D’oh!

No idea, then…

The only thing that I could find that looked "relevant" to this section was this link:

http://motley-focus.com/raven.html

I apologize if this was not what you're looking for....I'll keep digging.