The Clue in the Diary is a Nancy Drew book. It has 192 pages. It says that the author is Carolyn Keene but that is just a house name for the Strathmeyer Syndicate.
The Infinity Clue has 190 pages.
The Clue in the Embers has 192 pages.
Pirate Diary has 64 pages.
Eve's Diary has 109 pages.
The Clue in the Crumbling Wall has 181 pages.
The Clue of the Hissing Serpent has 181 pages.
The Clue of the Screeching Owl has 177 pages.
Diary of an Ordinary Woman has 420 pages.
The Rum Diary - novel - has 204 pages.
Diary of a Bad Year has 304 pages.
Extracts from Adam's Diary has 89 pages.
"The Clue of the Velvet Mask" by Carolyn Keene has approximately 181 pages.