A funny children’s book I read in early/mid ’80s where the three monsters were in a castle (Dracula’s??) with an elderly lady, seems like it was somebody’s Grandma. Part of the story was the Grandma trying to cure the werewolf. He would recite the seas on the moon so not to change.
This is Frankenstein’s Aunt by Allan Rune Pettersson. Published by Little Brown in 1980. When Aunt Frankenstein arrives at the castle of her nephew, who created the monster, to restore that place to order and clear the family’s blackened name, she encounters both Dracula and the werewolf and attempts to solve their problems too. See more here http://en.wikipedia.org/wiki/Frankenstein's_Aunt_(novel)
Thank’s Melissa! That it. Now to procure a copy for my son.