I feel like Justin Richards did an amazing job of capturing the sass of 9 and the determination of Rose. This book has suspense, plot twists, and great mystery. I would probably give it a 4.5 out of 5 stars.

In addition: I really enjoyed how The Doctor doesn't curse in this novel. I've noticed that some of the other Doctor Who authors have their Doctors occasionally curse, which is outside the personality of the TV Doctor. It breaks the "realism" of the novel for me and I appreciated that Richards stuck to the true personality of The Doctor.