Many of the cerebellar scientists of the established generation have contributed substantially to the quality of this issue. In addition, the book is marked by chapters from the coming generations of scientists who will determine the direction of cerebellar research for the next century. As in other fields of neuroscience, this research will be dominated by molecular neurobiology and new functional imaging techniques. Altogether, the book is pluriform and unique in that it is multidisciplinary, in that it promotes different views on cerebellar function, and that it is being published on the verge of different era's dominated by different generations of cerebellar scientists. The wealth of new information and ideas contained in these important papers will stimulate even more intensive research in the twenty-first century leading to a greater understanding of cerebellar function(s).