Short simple novel set in the world of the Elite (aka Frontier) videogame. Please do not judge the book for being just "about a game", at least for two reasons: Elite (nowdays Elite Dangerous) is not an ordinary videogame, but it's a space simulator when players can fly in a 1 to 1 reproduction of the Milky Way, in a universe created according to actual Nasa measurements (where possible). Moreover, this book is not just about the game, but it's a very nice story, well written: in my opinion much better than majoirity of science-fiction stories you can fetch out there. Therefore - if you like science-fiction - you should enjoy the novel even if you don't know Elite, and even if you don't like videogames.
Given this... if you instead know the game, and if you played Elite Dangerous, then you will definitely love it. In this book you'll find the first references to the Dark Wheel, to Raxxla, and to the beloved old worlds. And many subtle details about the weird creatures living in our galaxy.