UPDATE 4/13/10 Appears to have come back in print recently in a library-binding edition! Buy it new right now at Amazon or Barnes & Noble!
One of the poems, "The Ghoul", stands out among the others in its sheer gruesome explicitness. It actually kind of shocked me when I first read it as a child, to the extent that it stuck with me long after I'd returned the borrowed book to the public library.
Here is a sampling of the illustrations and interior pages, with the complete text of "The Ghoul" at the end:
THE HAUNTED HOUSE
"Shadows from the dim hereafter
hang from every creaking rafter,
laughing disembodied laughter
in their ghostly glee."
-excerpt from The Haunted House
THE WILL 'O THE WISP
THE DANCE OF THE THIRTEEN SKELETONS
The gruesome ghoul, the grisly ghoul,
without the slightest noise
waits patiently beside the school
to feast on girls and boys.
He lunges fiercely through the air
as they come out to play,
then grabs a couple by the hair
and drags them far away.
He cracks their bones and snaps their backs
and squeezes out their lungs,
he chews their thumbs like candy snacks
and pulls apart their tongues.
He slices their stomachs and bites their hearts
and tears their flesh to shreds,
he swallows their toes like toasted tarts
and gobbles down their heads.
Fingers, elbows, hands and knees
and arms and legs and feet -
he eats them with delight and ease,
for every part's a treat.
And when the gruesome, grisly ghoul
has nothing left to chew,
he hurries to another school
and waits...perhaps for you.