Why have another book in the bone-calcium field? When the idea was first raised that this important area of biomedical research should be given more attention in the review literature, we felt that comprehensive texts recently published and in press were directed at more general audiences and did not address in detail some of the important areas of current investigation. As this field has grown and matured, information has accumulated at such a rapid rate that it has become impossible to keep abreast of all areas by reading the original articles in the scientific literature. Accordingly, we...