The Children of the Lens are the culmination of the Arisian breeding program, and are to be their weapons in the final assault on Eddore.
Kimball Kinnison and Clarissa MacDougall have had four children. Born with the abilities Kim possesses, these kids will become the 'third stage' with an ability to join their minds in an all-powerful gestalt.
They are talented enough that they can shadow the Second Stage Lensmen without them knowing, and help them out. Each of the four has a favorite among the Second Stage Lensmen, even if they won't admit it.
This book has a different feel, in that it is a tiny bit focused on family, and the mental war part of it means the insane space battles are a much smaller part of the whole thing.
The end is the final battle between the Arisians and the Eddorians, with the third-stage Kinnison gestalt as an important part of the assault.
Afterwards, what the Arisians tells the Children comes as a bit of a surprise.
3.5 out of 5