Innocence proves nothing. Suffer not the alien to live. Burn the witch. These are the doctrines of the Emperor's Holy Inquisition, that most clandestine and vaunted order that protects mankind from the unspeakable horrors lurking the darkest shadows of the galaxy. Heretic, mutant, alien and daemon are all prey to the inquisitors, men and women who have devoted their lives to the destruction of such abominations. Their work must be conducted in secret and yet the posses the power, given unto them by The Emperor Himself, to command armies and order the destruction of entire worlds. Step into this world, if you dare, and heed the maxims of the Inquisition - Speak not unto the heretic, heed not the words of the daemon, look not upon the alien! Within this book you, my interrogator, will find a vast compilation of lore concerning the Inquisition. Famous inquisitors, such as Eisenhorn and Revenor, their allies, adversaries and weapons, plus more besides are covered in this encyclopaedic-style volume and illustrated throughout. Be warned though, many secrets lie within. Is your soul strong enough to resist the corruption?