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 Great Pyramid Robbery has 304 pages.
The Pyramid. The Soviet Mafia has 260 pages.
180 pages
113 pages
Red Nails has 143 pages.
With Red Hands has 336 pages.
The Red Necklace has 384 pages.
The Red Box has 298 pages.