Dependng on the edition, it could be anything, mine has 358 but, some classmates have fewer.
Moon Mirror has 199 pages.
The Moon Maid has 412 pages.
The Moon's a Balloon has 312 pages.
Maza of the Moon has 342 pages.
The Moon Is a Harsh Mistress has 382 pages.
"Keeping the Moon" by Sarah Dessen has 228 pages.
Keeping Faith has 432 pages.
Keeping You a Secret has 250 pages.
The Keeping Place has 754 pages.
Moon Mirror has 199 pages.
there is 563 pages in New Moon
The Moon in the Cloud has 176 pages.
Checking on the Moon has 208 pages.
Jewels from the Moon has 65 pages.
By the Light of the Moon has 496 pages.
Magic Moon has 480 pages.
Faces in the Moon has 193 pages.