Want bad voices? Characters who forget plot points every three chapters and need to ask them again? Concepts being explained but not enforced? Random changes of setting that are unannounced and leave you wondering where you are? Maybe some plot points that are brought up late in the story but characters act like they’ve been explained the whole time? The sex scenes just being added in back to back with little more than teasing prior to it? This book is for you!
TL; DR narrator should avoid dialogue and author needs to keep notes on what’s been established.