GOODNIGHT GOON

“In the cold gray tomb / There was a gravestone / And a black lagoon / And a picture of— / Martians taking over the moon,” begins this snort-inducing parody of one of children’s literature’s most sacred texts. Rex replicates the scansion and composition to a T, placing a befanged young werewolf in a green-blanketed bed under a picture of “three little mummies rubbing their tummies” and watched over by “a hairy old werewolf who was hollering ‘Boo.’ ” It’s something of a one-joke wonder, but what fun it is, as the goon wreaks a little havoc before being ordered under the bed by the stern little werewolf: “Goodnight monsters everywhere.” (Picture book. 7 & up)