The Richest Volume In The Technic Civilization Saga?

Is Volume I, The Van Rijn Method, the richest volume in The Technic Civilization Saga? 

First, it collects eleven installments of the Technic History, more than any other. The others are:

II, 7

III, 6

IV, 3

V, 4

VI, 6

VII, 6

The number of installments in each volume differs this much because several of the installments are novels, e.g., Volume IV, Young Flandry, collects a trilogy, three novels.

Secondly, Volume I must introduce the Technic History. Characters do not begin to recur until the seventh installment.

Thirdly, Five stories, "The Saturn Game," Wings of Victory," "The Problem of Pain," "How To Be Ethnic In One Easy Lesson" and "The Season of Forgiveness," are about characters with problems and have no characters in common. Just one of these characters, Adzel, will return in Volumes II and III but we do not know that yet when reading Volume I.