Not sure what to rate this book. From an aspect of science, it was amazing. Other than that I really didn't like it. I had no care for the characters, the diary entries were written like something I would write in Year 9 when we had to write a story from a diary entry POV and I was trying to make the word count bigger. I felt as if it just dragged on and on when it could've been wrapped up quicker and I found it to be one of the least suspenseful books I've ever read.