I found Elvira!! Now what do I do

Hint 1 of 4:

Well, you could go back to my dressing room and celebrate . . .

Hint 2 of 4:

But don't forget that the Top Dog's still running loose in the neighborhood

Hint 3 of 4:

The directions for getting rid of him are in the library book called (more)

Hint 4 of 4:

. . . THE STUDY OF DEMONOLOGY in the Humor section