I read this before electricity was invented so it's not exactly fresh in my mind but the most interesting thing I remember is that the author went on to sell used cars and eventually declared bankruptcy. First class charlatan. 
 The book is basically a promotion of self-indulgence. Not much more than that from what I recall. A disappointing read if you're looking to be shocked and a hollow read if you're seeking deep philosophical insight. 
 Still glad I read it. It helped launch my interest in philosophy at the time along with Mere Christianity.