In the introduction to her first collection of poetry chosen for young people, May Swenson points out that ""a characteristic of all poetry...is that more is hidden in it than in prose."" These poems are puzzles, then, only in the large sense that metaphor, symbolism and other devices make all lyric poetry mysterious. In the first section, Some Riddle Poems, the subject is not mentioned in either the title or the text; in the later sections, offering poems about cats, birds, the sea and other wonders, the meaning unfolds to disclose new interrelationships and implications. These are not especially difficult poems--the syntax is simple, the logic logical--but they do demand awareness and attention on the part of the reader. Teachers may find the novel approach useful; youngsters will enjoy the fresh imagery and firm touch of a fine contemporary poet.