Nice, this book is a series of lectures Khomeini delivered in which he talks about the battle against one's own self to purify their heart, soul and actions.
it could possibly be a novel read for a non-muslim but in mosques they usually talk about thinga very similar to that and that for most muslim readers would have already heard before they read this.
still a nice very very short read both as a piece of text and to understand the thoughts to an extent of the clerical side of khomeini .