The complexity of the brain and the protean nature of behavior remain the most elusive area of science, but also the most important. van Hemmen and Sejnowski invited 23 experts from the many areas--from evolution to qualia--of systems neuroscience to formulate one problem each. Although each chapter was written independently and can be read separately, together they provide a useful roadmap to the field of systems neuroscience and will serve as a source of inspirations for future explorers of the brain. The complexity of the brain and the protean nature of behaviour remain the most elusive area of science, but also the most important. Written by 23 experts from many areas of systems neuroscience, this book provides a useful roadmap to the field of systems neuroscience, and aims to serve as a source of inspiration for explorers of the brain.