104 pp. depending upon the published edition .
The Time Machine by H.G. Wells is a relatively short novel, typically around 100-150 pages, depending on the edition and formatting.
The Omen Machine has 525 pages.
Good Omens has 288 pages.
The Technicolor Time Machine has 190 pages.
The Accidental Time Machine has 275 pages.
The Great Time Machine Hoax has 190 pages.
The Mightiest Machine has 228 pages.
The War Machine has 338 pages.
The Preserving Machine has 317 pages.
The Meme Machine has 264 pages.
The Myth of the Machine has 1352 pages.
The book has 392 pages.
The God Machine - comics - has 160 pages.
The Machine God Laughs has 134 pages.
Machine Man - novel - has 288 pages.