Gyro's First Invention has 20 pages.
The Waltz Invention has 111 pages.
The Invention of Solitude has 173 pages.
The Invention of the Jewish People has 358 pages.
The Invention of Everything Else has 272 pages.
The Heroic Age of American Invention has 290 pages.
525 pages (including pictures)
20 to 90 pictures
The First Death has 37 pages.
First Meetings has 149 pages.
The First Circle has 741 pages.
First Lensman has 306 pages.
After the First Death has 233 pages.