The standard of writing in Doctor Who novels doesn't seem to be a priority with the publishers, but Amorality Tale is certainly one of the better attempts.
It has an interesting historical setting of the East End of London in the early fifties. However, since it is based on a historical event in which thousands of people really did die, I found this tasteless.
Bishop creates a likeable anti-hero in Tommy Ramsey and the chemistry between him and his mysterious new assistant Sarah Jane Smith is excellent until Bishop ruins it later in the book. But while I care about Tommy and Sarah, the Doctor is very underused and has little interaction with characters, so by the time he starts getting involved, I don't care and there's no chemistry between the Doctor and Sarah. Big errors in a Doctor Who novel.
As for the other characters, there are too many names to remember, and they all wash into one amorphous mess, while most characters are only set up to make the death count more emotional. Far too many people die in this.
I don't enjoy the ending, feeling it cops out. It doesn't follow through on the plot and isn't very clever. Also, it deals with `historical fact', which is always confusing in time travel stories, especially Doctor Who.
The book is enjoyable, but there are several problems, which when added to a feeble ending, mean I won't be reading this again.