This sounds great! A more contemporary take on the Screwtape Letters (fabulous!); this time, instead of Screwtape and Wormwood, it's A. F. Christian ("a former" Christian) writing to the prolifically publishing new atheists of our time.
Speaking of Screwtape, it looks like the stage version of Screwtape is playing in New York; will it return to Chicago and points west? We saw it about two years ago: fabulous. (On the Facebook page, you can enter a contest to win tickets to the performances in NYC.)
The review linked above is by one of Fr. Barron's associates at Word on Fire Catholic Ministries.