This is a novelization of the game known as Kingdom Hearts: 358/2 Days and compared to its other medias it is the weakest one by far. The narrative is sloppy due to a poor choice of words used to describe everything. But it is by no means bad. The three volume-lenght story features a boisterous cast of likeable and charismatic characters (Xion and Roxas especially) and a really nice art. The story is engrossing and not repetitive and the ending is heart-shattering. But it is a really bad adaptation of one of the best installments of the franchise.
Read the manga or just go ahead
and play the game both are far more superior than this novelization.
Story - 5/10
Character - 7/10
Art - 8/10
Enjoyment - 3/10
Overall - 5/10