Flags Out Front: A Contrarian's Daydream by Douglas Wilson
It concerns a fictional fundamentalist Bible college in the American South (called Choctaw Valley Bible College), and its mild-mannered president, Dr Tom. One night a prankster switches the flags at the front of the college so that the Christian flag is higher than the American flag (see the cover illustration). Dr Tom decides to let it remain like that, and a controversy ensues.
Flags Out Front is all about what being a faithful Christian looks like in modern America. Wilson makes the point that faithful Christians will have enemies on both the left and the right of politics.
Wilson includes plenty of humorous asides, and has obviously been inspired by P. G. Wodehouse in both his plot and his choice of words. This book has instantly become one of my favourites.