i bought the books because i missed the movie at the cinema. If you have watched or read the "5th Wave" then this book is very similar. although this book was publishes first, and the "5th Wave Series" written after, so in my view one author sort of copied the other. the writing is very similar. Young teen/teens saving the world. I really enjoyed this first story, and i have not read the other 4, although the central them, seems to stick closely to the original theme, where the "5th Wave" lost the plot. i like world destruction books, and there have been several series already written. a very good read and i can recommend it all readers especially if you are into this type of story line, like "Divergent", "Hunger Games" etc.