Like many I think this book is stronger in concept than in execution. The Long Earth is a cool idea--that alternate versions of Earth are available to us with a thought, perhaps guided by a machine powered by a potato. The scope of the book is huge, potentially infinite, which is something I am drawn to. But Terry Pratchett is known for his humor, and this collaboration with Stephen Baxter takes all that away. The idea dominates the book. The main character, Joshua, is close to a cipher in terms of personality. Lapsang the artificial intelligence has something more going on, and I am aligned with his desire to explore all the way to the end of the Long Earth. Sally and Helen offer possibilities but are also pretty stiff. In the end, I blame the collaboration. The strengths of both authors are watered down.
