The island of Borneo is home to some of the world’s most spectacular slipper orchids. Rothschild’s slipper orchid has inflorescences with three to six flowers with a span of up to 30 cm, while Sander’s slipper orchid has twisted hanging petals up to a metre long. Added to their bizarre appearance, both are extremely rare in nature and threatened with extinction as their colonies are depleted by collectors and their habitat is shrinking under the pressure of rising populations and development. These are only two of a range of exotic slipper orchids that grace and enhance Borneo’s ancient landscape. As ecotourism rises in the region, the slipper orchids provide a focus for visitors who wish to see the rare and exotic in natural settings. This book outlines the history of Borneo’s slipper orchids, their taxonomy, distribution, biology, ecology and conservation in an accessible manner.