Some books are already appearing that take additional advantage of the screen and interactivity of the iPad etc --full-page color children's picture books for instance, and material like the historical video clips and interviews in the enhanced version of Del Quentin Wilber's Rawhide Down about the Reagan assassination attempt. Meanwhile some books also include interactive graphics and audio. Children's classics and new creations alike are exploring ways to delight and instruct through kids' natural instinct to explore by touching. Further along the age scale, iSolar System for iPad by Marcus Chown explains, informs, and includes rotatable planet views plus working models of solar system orbits available from every "page." And in the Reference category, efforts like iBirds Pro HD hand you the sort of guide you've always wished you had--maps, songs, photos and more, and controls to use and move among them.