Souls in the Great Machine has 598 pages.
The Great Time Machine Hoax has 190 pages.
Feast of Souls has 464 pages.
Old Souls has 256 pages.
Paladin of Souls has 456 pages.
The Lake of Souls has 272 pages.
Lord of Souls has 304 pages.
Twisted Souls has 336 pages.
Bridge of Souls has 528 pages.
The Mirror of Simple Souls has 303 pages.
Carnival of Souls - Buffy novel - has 320 pages.
The Preserving Machine has 317 pages.
The War Machine has 338 pages.