24 Chapters
- 1 THE OWNER OF NEW YORK
- 2 THE SHADOW OF MYSTERY
- 3 THE MOVING FINGER WRITES
- 4 DARKNESS AND PANIC
- 5 A SCIENTIST IN PINK SILK
- 6 THE WRATH TO COME
- 7 A WORLD OF GHOSTS
- 8 PERCY DARROW'S THEORY
- 9 THE GREAT SILENCE
- 10 THE LIFTING OF THE SPELL
- 11 THIRTY SECONDS MORE
- 12 THE UNKNOWN
- 13 DARROW'S CHALLENGE
- 14 THE FEAR OF DANGER
- 15 THE MASTER SPEAKS AGAIN
- 16 THE PROFESSOR'S EXPERIMENT
- 17 DRAWING THE NET
- 18 CONFUSION WORSE CONFOUNDED
- 19 PERCY KEEPS VIGIL
- 20 THE PLAGUE OF COLD
- 21 IN THE FACE OF ETERNITY
- 22 THE MAN NEXT DOOR
- 23 HOW IT ALL WAS
- 24 WHAT HAPPENED AFTERWARD