This is the worst "Doctor Who" book I have ever read. The Sixth Doctor, who was never as annoying and unlovable on TV as some consider him to be, lives up to his bad reputation in this book. Peri and Turlough are also poorly characterized. The worst aspect of the book, though, is the depiction of Chris, the character who represents the reader. One of the most important things in writing a plot-your-own story is to make the reader-character agree with readers' own perceptions of themselves. I would certainly never say "Wowee!" as Chris does early in the book. The drawings by Gail Bennett are also poor, being only slightly superior to her hideous portrait of Jon Pertwee which appeared in "Timelash."