Once An Eagle has 1312 pages.
Under the Eagle has 256 pages.
The Eagle's Prey has 480 pages.
The Eagle's Conquest has 256 pages.
A Catskill Eagle has 311 pages.
The Eagle Has Flown has 352 pages.
The Eagle of the Ninth has 255 pages.
"The Eagle Has Landed" by Jack Higgins typically has around 400-500 pages, depending on the edition and formatting.
378
Where Once We Walked has 736 pages.
Once - novel - has 150 pages.
Once a Hero - novel - has 400 pages.
And Kill Once More has 188 pages.