In the President's Secret Service has 288 pages.
Code words of the Secret Service are ambiguous words, many of which are used to refer to U.S. presidents. They are not known to the general public.
Cybele's Secret has 410 pages.
The Dutchman's Secret has 24 pages.
The Secret Hour has 297 pages.
The Secret Texts has 464 pages.
The Apeman's Secret has 184 pages.
The Secret River has 334 pages.
Blood Secret has 256 pages.
The Secret Magdalene has 448 pages.
The Secret Warning has 192 pages.
The Secret Panel has 192 pages.
The Secret of Evil has 192 pages.