As far as I have heard 160 pages
"Fire World" by Chris d'Lacey has 560 pages.
Soul of the Fire has 512 pages.
Forged in the Fire has 304 pages.
Fire Dreamer has 432 pages.
Gates of Fire has 400 pages.
The Demon Spirit has 544 pages.
Fire World has 432 pages.
600 pages
A World Lit Only by Fire by William Manchester has 320 pages in the paperback edition.
It has 432 pages.
Out of the Fire has 241 pages.
The Fire Kimono has 297 pages.
The Orchard on Fire has 320 pages.
The Fire-Eaters has 224 pages.
Fire Sea has 414 pages.
Muse of Fire has 100 pages.
Fire Angels has 436 pages.
The Devil's Fire has 228 pages.
Fire Study has 441 pages.