Monster self-help manuals are something I didn't know I wanted until right now. And it turns out a lot of them still work without changing the titles.

-Opening Your Presence: Presenting the YOU You Want Others to See

For ghosts.

-Good Power: Leading Positive Change in Our Lives, Work, and World

Frankenstein's monster

-True North

The yeti

-Once an Eagle

Rok

-multipliers

Werewolves or Dracula maybe?

Elizabeth Bishop was there first: https://www.poetryfoundation.org/poems/47537/the-man-moth