Dangerously disorientating to the unwary student, the Prajnaparamita or Perfection of Wisdom teachings can offer a fast route to some well-trodden blind alleys - or to the very heart of Reality. We live in a sophisticated age that often seeks to rationalize the ultimate meaning of Buddhism, but these two-thousand-year-old texts offer a giddying counterbalance to this attempt. Sangharakshita's clarity, scholarship and insight are revealed in this commentary on the Diamond Sutra, the Heart Sutra and the Ratnagunasamcayagatha - core teachings of Mahayana Buddhism. Using this book as a guide we can begin our own investigation of these sublime teachings - and also perhaps be rewarded with a world-shattering glimpse of the Buddhist vision of ultimate Reality.