Even though this is a Doctor Who novel it doesn't really have much to do with the Doctor. It is really a story about his companions, Ace and Bernice Summerfield. Disappointingly though it might be that the Doctor only makes the briefest of appearances this is compensated with a good portrayal and storyline for the two companions.
The book is divided into four parts. The first concentrates on Benny trapped in the early twentieth century and the second on Ace trapped on the planet Antykhon. Both have very different stories and settings but affect each other. The remainder of the book brings the two storylines together. It is a well-constructed and entertaining plot.
Benny is characterised very well and this is one of better book appearances. The novel also successfully catches the more mature, soldier version of Ace. There are quite a few other interesting characters. The villain, Muldwych, is left a bit vague but many others are well developed and, at times, entertaining.
The Charrl are an interesting alien species, despite being a bit similar to the Wirryn. Rather than being villains as such they are also victims and are just a race trying to survive with an ill-conceived plan.
This is a solid story, although it gets a little bit messy in the latter stages. If you want a novel where two strongly characterised companions take centre stage this is ideal. Just don't expect much from the Doctor.
Set in the early twentieth century this unmissable tale is not for the faint-hearted. Incredibly dramatic, amazingly energetic and scary; you do not want to listen to this at night! In Birthright, Professor Bernice Summerfied has her work cut out to save her future. Can she and her new friends save the world and stop the mammal-eating Charrl before it is too late? Great stuff.