I'll start by saying that this is clearly a very influential story, and it is by no means bad. The main reasons I'm only giving this 3☆ is stiffness of the characters and the mediocre motivations.

This is an old book, so I expected the stiff characters that accompany that, but that doesn't mean I have to like it. Many of the characters come off very prim and unlikable; although I'm not sure any of the characters are supposed to be likable, now that I think about it. Regardless, this led me to be severely uninterested in anything beyond the premise and theme of the story, which is arguably the main point, anyway.

Unfortunately, this only compounds with the poor character motivation. I use the singular there, because it seems the Invisible Man's only goal by the end is chaos. He's easily angered, and when he gets mad he jumps straight to violence. At the end of the book, he's just planning to become a serial killer. It's really not very well executed.

Where this book really shines is premise and themes, which have been discussed to death in literature classes around the world, so I won't get into them here. This is where all 3☆ came from.

IMO you should read this book if you're interested in old sci-fi, but don't go into it expecting anything transcendent. If you like classics you probably won't have an issue with this book, I'm just not a fan of the characters in classics.