I have read nearly all of Tim Marshalls book and although nothing can beat the OG Prisoners of Geography, this is certainly a brilliant book. I had never thought much about the politics of space let alone the geopolitics of it. I found it all very fascinating, a good introduction to the field of astropolitics and also gave lots of scifi recommendations that I will definitely give a go. Safe to say that Marshall continues to be one of my go to authors for understanding geopolitics and I look forward to any further books he may bring out.