The Sharing (Avon 1984) shows some folks all going for--what? Moist brownies? An evil lust for moist brownies? Is that it?
The Heirloom (Pocket 1981) is by one of Graham Masterton's pseudonyms. '80s kids had all the fun...
Don't Tell Mommy (Pocket 1985) with more face-melting mayhem.
Masques (Berkley 1981) has a creeptastic voodoo doll and a nice tagline and that font I love, ITC Benguiat. Pronzini is a crime writer but his books were often marketed to horror readers; you can see this title's other covers here.
The Breeze Horror (Onyx 1988) Hungry hungry curtains! I find breezy winds rather foreboding, but will that work for a whole novel?
And a couple creepy kids to wrap up: Children of the Dark (Ballantine 1980) and Satan's Spawn (Avon 1988).