PreS-K-- A young girl explores in the quiet of a summer's morning, observing--passively--all there is to see: a mockingbird in a tree, sunlight on the surface of a pond, clouds chasing across the sky. . . . But despite images of birds and clouds, Ryder's verse never takes flight, perhaps because she falls into the trap of addressing her reader as ``you,'' a choice that burdens her words with an inappropriate pragmatism. Nolan's elegant but lifeless paintings do little more than mirror the words on the page. These full-color illustrations are initially striking and may help to sell this very slight effort, but readers have only to compare the book to Yolen's Owl Moon (Philomel, 1987), a similar journey (but on a winter's eve), to know where their time's best spent. --Marcia Hupp, Mamaroneck Public Library, N.Y.