Ok, so this isn't a novel. It's not even a novella.
Darth Vader and Son is a simple picture/comic book with many different scenarios of, if Darth Vader was raising a 4 year old Luke Skywalker.
Mostly this book reminds me of Farside calendars, they are silly little scenarios with puns etc. except this one is mostly with Star Wars scenarios. Not all of them hit the mark but overall it's a good cheap book with laughs and will keep many a guest that comes to your house entertained. The pictures are well drawn and the book itself is well made and sturdy (you can let kids rifle through it).
My only gripe is that I wish every scene was something to do with Star Wars rather than a generic father raising a son scenario.
So if you are looking for a nice present for someone who likes Star Wars, I think you've got your ticket here.