Fifteen years after A Light in the Attic (1981) and 22 years after Where the Sidewalk Ends (1974, both HarperCollins), Silverstein, whose poetry has achieved cultlike popularity, offers readers another collection. While bodily functions seem to be the source of humor in more poems than in the earlier titles, and while there are fewer wonderful images here, the child appeal is as strong as ever. Once again, Silverstein's pen-and-ink drawings are the perfect accompaniment to the poems, always extending and often explaining the words. The book abounds in energetic wordplay ("I saw an ol' gnome/Take a gknock at a gnat/Who was gnibbling the gnose of his gnu") and childlike silliness ("I only ate one drumstick/At the picnic dance this summer...But everybody's mad at me,/Especially the drummer"). Silverstein writes wonderful nonsense verse, but he has used rhyme and rhythm to greater effect in the past. There is much to love in Falling Up, but it has its ups and downs.?Kathleen Whalin, Greenwich Country Day School, CT Copyright 1996 Reed Business Information, Inc.