Need help on a riddle?!

ok so I'm playing this game and this guy tales me this riddle and i dont now it this is the riddle my first letter is in spell but never in book my second letter is in fright and also in shook my third letter is in cauldron but never in pot my fourth letter is in net and also in knot my fifth letter is in bat but never in vampire my sixth letter is in coal but not fond in fire my seventh letter is in moon but not in night i dont really need to know it but its bothering me so much so please helpWww@Enter-QA@Com

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