This is a pretty fantastic book.
https://www.amazon.com/American-Christianity-Failed-Bryan-Wolfmueller/dp/075864941X/ref=asc_df_075864941X/?tag=hyprod-20&linkCode=df0&hvadid=312695266310&hvpos=&hvnetw=g&hvrand=16489342618513428869&hvpone=&hvptwo=&h...
A lot of people have read or been influenced by Wolfmueller's book about "American Christianity"
As a former evangelical, I think you might really enjoy it
https://www.amazon.com/American-Christianity-Failed-Bryan-Wolfmueller/dp/075864941X