I have read other biography's of Lewis (A.N. WIlson's most notably) & was hopeful to get at the heart of the real Lewis, but was taken on a fly-by of his life from 30,000 feet. (A good fly-by, but a fly-by none-the-less).
Gresham is a gifted writer, as his mother & stepfather were & hopefully other works (including a more detailed biography) are forthcoming. This is an excellent book for someone wanting to get the life of Lewis in a nutshell & use it perhaps as a launching pad for further study.
On a somewhat seperate vein, I was very disappointed with the publisher. The editing was atrocious. It seemed like they did not even bother to look at a proofed copy. I would be embarrassed if I were Mr. Gresham & had that poor of a job done to my publication. Good book...HORRIBLE editing.
See more here.