Wow, wow, wow! What an interesting story! I really enjoyed this, the story is interesting fro the start. I found the whole thing fascinating, the idea of Petra going into space, the world facing a comet that's going to destroy Earth. The whole story was very interesting from the start. I found it gripping near the end of the extract (how can you end it on that cliffhanger!?) I really wanted to read more and can't wait to read this book in future! The cover is good too, it's what drew me into this story, although the cover didn't really tell me this was a sci-fi tale. Thought it more fantasy.