Gr 4-5-These basic introductions to our solar system's star and outer planets are also-rans next to Larry Dane Brimner's recent "True Book" updates (Children's), but they do have some additional facts, particularly about the planets' moons. In Saturn, Kerrod describes the atmosphere, structure, rings, and most of the plethora of moons with crisp fluency, pausing for a closer look at Titan, the largest satellite, and closing with a tally of the space probes, Pioneer 11 to Cassini, that have been dispatched to those distant reaches. Uranus is similarly arranged; Sun covers not only inner and outer solar phenomena, but also earthly seasons, eclipses, the life and death of stars in general, and related topics. The profuse illustrations, which include diagrams, paintings, and average-quality space photos, are the books' chief weakness. The photo of Saturn's moon Mimas accompanying a description of its outsized crater doesn't show the crater, for instance, and Sun not only has a page of meaningless visual filler, but opens with a hard-to-read block of text printed over a bright, grainy, red-and-yellow close-up of the photosphere. None of the books include Web sites or sources of further information. Deeper collections may have a place for these supplemental offerings, but they're not first purchases.-John Peters, New York Public Library Copyright 2002 Cahners Business Information.