Mike Tucker has written several doctor who novels in the past, but they all featured ace and the seventh doctor. This is his first go at another tardis crew.
You know what you're going to get with this range of books. They're not going to be great literature or novels in their own right, they are going to be a doctor who story on the printed page that could - if the BBC would increase the budget - be done on the TV screen. And they will stand or fail on how well the writer depicts the tardis crew.
The second batch of ninth doctor books were helped by the writers having seen the doctor in action on the tv screen, given that the first were written before they'd had a chance to. The same seems to have been true with the tenth doctor. And thus, having seen what he's like, the writer does capture the character very well. The same is true of rose.
The plot is a curious beast. Starting out with a wonderfully scary encounter between a rain soaked fisherman and a monster, and giving us spooky chases through dark woods and villages full of frightened people, it doesn't quite make the most of all of this. And indeed not a lot of the book actually takes place on black island!
But for every part of the plot that feels over familiar, there are bits that are quite clever and fresh.
So this isn't a great piece of literature, but it's a good solid bit of literary doctor who, and generally worth your time