The Dark Heresy 2nd Edition Core Rulebook (PDF) is generally regarded as a well-balanced, high-quality, and more flexible improvement over the first edition. While the 448-page book features praised, atmospheric art, many users report that the large PDF file can be sluggish or have rendering issues on mobile devices. For more details, visit DriveThruRPG . BoLS Review Dark Heresy 2nd Ed ! Fantasy Flight Games