Leviathan was a good book to read. There where certain parts of the book that I didn't get or understand. There were machines and creatures in the book that I have never heard of before, so I was like "What....." There was one part in the book where I was thinking "How can he do that! Aleksandar is just a young prince and he tried to kill him." I think it is just right for young adults to read. I personally like the book in general.