Book excerpt: Handy guidebook to scrambles in Snowdonia, Wales. All the routes described lie within the northern half of the Snowdonia National Park. Includes the Glyders - mostly concentrated on Tryfan, Glyder Fach and Glyder Fawr - the Snowdon group, Carneddau and Eifionydd regions. Routes range from scrambly walks to the boundaries of proper rock climbing.