Your friend saw this resource on bethinking.org and thought you should see it:
From Atheism to Christianity: a Personal Journey
A former atheist's testimony of his journey to Christian belief via the writings of C.S. Lewis.
See the full resource online by visiting bethinking.org:
https://www.bethinking.org/is-christianity-true/from-atheism-to-christianity-a-personal-journey
---
bethinking.org is a collection of resources which aims to make sense of the big questions of life about God, Jesus and Christianity.