FTP, identify  this work by C.S. Lewis.
It is narrated entirely through a series of letters from an  uncle to his nephew. In the letters, a story is told of a young  man who is struggling with love, the second world war, and his new  religion, Christianity. The uncle exhorts his nephew, Wormwood, to  do everything he can to disrupt his subject's newfound faith, which  makes sense because Wormwood is his guardian devil. FTP, identify  this work by C.S. Lewis.
It is narrated entirely through a series of letters from an  uncle to his nephew.
The {Screwtape Letters}