These twenty books recommended for the nursery (infants to age three) are listed almost entirely in board book editions. Board books are ideal, so that youngest children can freely toss the books, grab them by the pages, chew on them when they’re teething, and begin to feel completely comfortable with books as part of their everyday experience. Of course, you may also want to buy the jacketed hardcover down the road (or keep a copy in the living room and in the nursery).