D-99 by H. B. Fyfe

Five citizens of Terra were being held on other worlds — and the ultra-secret Department 99 existed only to set them, and others like them, free.

Chapter 1 – 00:00
Chapter 2 – 15:07
Chapter 3 – 29:29
Chapter 4 – 44:38
Chapter 5 – 58:11
Chapter 6 – 1:10:09
Chapter 7 – 1:23:42
Chapter 8 – 1:36:38
Chapter 9 – 1:52:49
Chapter 10 – 2:05:56
Chapter 11 – 2:20:03
Chapter 12 – 2:32:45
Chapter 13 – 2:46:28
Chapter 14 – 3:00:05
Chapter 15 – 3:14:06
Chapter 16 – 3:27:24
Chapter 17 – 3:40:28
Chapter 18 – 3:57:10
Chapter 19 – 4:11:19
Chapter 20 – 4:24:09