The Unknown Terrorist has 325 pages.
The Third Terrorist has 384 pages.
American Terrorist has 426 pages.
The Terrorist Hunters has 334 pages.
A Feast Unknown has 286 pages.
The Rim of the Unknown has 291 pages.
The Unknown - Animorphs - has 166 pages.
The Unknown Shore has 288 pages.
Sender Unknown has 258 pages.
The Unknown Zone has 174 pages.
The Fringe of the Unknown has 208 pages.
The Unknown Terrorist was created in 2006.
The Unknown Witches of Oz has 240 pages.