The Seven Wonders of Sassafras Springs, by Betty Birney, is 210 pages long.
"Seven Ancient Wonders" by Matthew Reilly has approximately 516 pages in the paperback edition.
Wintle's Wonders has 256 pages.
The Wonders of Nature has 600 pages.
Wonders of a Godless World has 260 pages.
Tom Swift in the Land of Wonders has 200 pages.
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The Amazon Temple Quest is by Katherine Roberts. The Kindle version has 291 pages. The paperback also has 291 pages. It is part of the The Seven Fabulous Wonders Series.
How many years once seven wonders of the world is nominated and declared?
Seven.
Seven Out of Time has 240 pages.
The Spell of Seven has 192 pages.
The Seven Hills has 368 pages.