In all of Douglas Adams work there is a brilliant mixture of wit, genius and all round brilliance, something that Gareth Roberts does well to replicate in this. The story is a well written interpretation of Adams' work and, whilst containing the wit and humour of a hitchhikers adventure, brings in an element of modern doctor who, making the book relevant to fans of doctor who, old and new, and fans of Douglas Adams work.
The plot is absolutely brilliant and it would make a truly beautiful episode. I love the way in which the doctor will go from saving the world one second to having a conversation with the ship. This makes the story fun to read and not too dramatic.
And my favourite moment is brilliant and near the end of the book, where the professor explains how he stole the book. He explains that he replaced the book with another, from Earth. He couldn't explain what it was though. Something about towels and thumbing a ride. I find that moment beautiful and it's one of the highlights of the book.
In conclusion, Shada is an excellent telling of one of Douglas Adams lost scripts, with Gareth Roberts demonstrating why he's so brilliant at Doctor Who. A funny, clever and thoroughly entertaining adventure, I give Shada nine out of ten.