The book The 100-Year-Old Secret by Tracy Barrett has 176 pages.
Secret Agent of Terra has 127 pages.
The Chinese Agent has 185 pages.
Polity Agent has 496 pages.
Agent of Byzantium has 244 pages.
Agent of Vega has 191 pages.
Agent to the Stars has 286 pages.
The Presidential Agent has 655 pages.
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.