Yes, it's an adaptation of the 90s movie. The movie is amazing and I do recommend it if you have not seen it. I was watching it the other day and found out there was a book adaptation.
The book follows the movie almost exactly told from the points of view of the different characters. Since I had seen it recently (and have watched it numerous times before then) I did notice when some of the dialogue was different. For the most part, I found it toned down most of the dialogue.
I was hoping it would add to the movie and it did include a few scenes that weren't in the movie, but I knew were deleted scenes from the bloopers at the end. But it's not necessary.
The movie is amazing though.