Montes’s vivid poem, replete with the appropriate creepiness, describes all of the usual—and some not-so-usual—Halloween suspects. Under the full moon, los gatos slink, yowl and hiss. Las brujas fly on their brooms. Los esqueletos rattle their bones. Pumpkins burn, mummies stalk, the wolfman prowls, the dead rise and ghouls and zombies march across the pages, all parading toward a haunted mansion for a monstrous ball. Eerie music resonates throughout the night, and all of the creatures begin to waltz, boogie and bop—until tres loud raps (“Rap! Rap! Rap!”) sound at the door. Who could it be? Not children trick-or-treating! Suddenly the creatures vanish. Nothing scares a monster more than human niños, particularly on Halloween. Spanish words, perfectly defined by context, flow smoothly throughout the atmospheric, rhymed text and are officially defined in an accessible glossary at the story’s end. Morales’s dark, glowing pictures of inventively proportioned ghosts and other sinister night creatures provide the ideal accompaniment. A spooky seasonal treat and a great choice for any collection. (Picture book. 6-8)