It depends on which edition you have.
"The Red Pyramid" by Rick Riordan has approximately 516 pages in the hardcover edition.
No IT has 519 pages
The Jungle Pyramid has 180 pages.
The Pyramid - Kadare - has 224 pages.
The Pyramid. The Soviet Mafia has 260 pages.
The Great Pyramid Robbery has 304 pages.
180 pages
113 pages
Red Nails has 143 pages.
Autobiography of Red has 149 pages.
The Red Box has 298 pages.
Red Equinox has 299 pages.