It's just a small book for bits about the two Death Stars and even Starkiller Base - how they work, their weapons, stuff like that. I got it mainly for the model, which is small when done, approximately between 4-5 inches, but in the end, I realized that yeah, that was good for the space I actually do have. But it was nice and easy to put together, something that this person right here with no real talent to do a more complicated model so very much appreciated.