Look, including books with introduction to hell is Jeremiah's habit (9)
I believe the answer is:
loincloth
'jeremiah's habit' is the definition.
I can't judge whether this defines the answer.
'look including books with introduction to hell' is the wordplay.
'look' becomes 'lo' (archaic exclamation meaning 'look!').
'including' becomes 'inc'.
'books with' becomes 'lot' (I can't justify this - if you can you should believe this answer much more).
'introduction to' suggests taking the first letters.
The first letter of 'hell' is 'h'.
'lo'+'inc'+'lot'+'h'='LOINCLOTH'
'is' is the link.
Can you help me to learn more?
(Other definitions for loincloth that I've seen before include "Simple garment" , "scanty garment" , "Minimal garment" , "Minimum clothing?" , "Sort of dhoti" .)