The movie was in the 80's and it was about a guy who comes across a underground world of these human like creatures one of them had a moon shaped head and it came with a booklet that described all the creatures if anyone can help me with the title or director please email me at...
[email protected]

Thank you,

I didn't get any replies to my film title question either.
You might want to try emailing the american film institute. They sorted my question out and quickly too!

Nightbreed (1990)

You can read the plot summary here:
Nightbreed (1990) - Synopsis


Nightbreed (1990) - IMDb