All screenplay adaptions come with one downside, you know the ending if you saw the movie. That being said this is one of the better ones I have ever read.
This isn’t the first time I have read this. Back in the 1980s I remember reading this in my middle school library and it had an impact on what I read. I found I liked sci-fi (prior to this I was mostly a fantasy reader) and I liked my first real taste of horror in a book (I have always liked horror movies).
The book keeps right up with the movie, there is the same tension even after having watched the movie and it keeps you going. The better part though is that Alan Dean Foster is able to dig deeper into the characters and give them more feeling. Even Brett, probably the single least developed character in the movie was a lot more fleshed out.
Of course the majority of the addition to the book is before they landed on the planet with little bits between scenes, but it was enough to build the world up even more.
If you like reading sci-fi and if you like the Alien franchise this is a good, quick read. I plan on reading the rest of the books, including the new books coming out that take place between each of the movies. It is a definite thumbs up!