In a game I am about to play, there is a Bard who wants a pet owl. Can I as a warlock cast the find familiar spell on her behalf? I realize it is not a warlock spell, but if I take the Pact of the Tome I can also take the Book of Ancient Secrets eldritch invocation.
If I can cast it on behalf of someone else, can I still use it on myself to create a separate familiar? Or is that off the table as soon as I cast it?