I have never read any of the other books in the Christian Encounters series, so I do not know how this compares.
I did find the "Christian Encounter" aspect to be a little… restrained. Little mention was made of his faith, although I did enjoy reading how much he influenced C.S. Lewis in his.
The facts were a little dry, and I found the book skipped over a LOT. I suppose it was trying to be readable while still informative, however I found it a little simplistic. I am not sure if it is perhaps aimed at the Young Adult or older children market, but if so it was a little too academic.
I did learn quite a bit that I did not previously know, but I would have preferred more of an insight into his inspirations and influences, not just his basic history.