A close friend of mine is r"l slipping down very bad. Right now he is at the stage where r"l he doesn't believe in "Torah min hashamyim", "am hanivchar", etc. can anyone recommend any solid good books on these topics which I can send him to read?
Wasn't sure where to post this. Couldn't find anything on this topic. If there is a already a thread on this topic please direct me
As others have said, just be there for him as a friend. IME, the vast majority of people who start questioning a deeply-held faith only do so when something in their life isn't going well: personally, financially, etc. It leads to questions that they often feel are better than the answers.
So help him out with whatever these issues are, be a friend, confidante, etc., and don't be overly judgmental because that certainly won't help.