The only sound I heard was the explanation whooshing over my head. 
 I'm one of those people who loved Bird Box but couldn't stay with this. I admit I ripped through this book but I think that was mainly because I wanted to see what the hell was going on. It is well written-it's one of those rare books where flashbacks are actually needed and used perfectly. I liked Phillip and Elanie, the rest the Danes and other characters were basically nothing to me though. Mainly it's just too many intriguing possibilities that are set up but then at the end uses yet another way to explain what was going on and it was thoroughly confusing and in no way satisfying-even in a dream logic, trippy kind of way because it didn't say anything. 
 Bird Box was great but it didn't explain much other than don't look at anything. This one gave you too much of reason to need it explained and when it tried it was mush. 
 The ideas about war were interesting but didn't really matter, I think? I liked the doctor and high military command sinister doings. Other than that, sadly it lost me. Phillip's final actions at the hospital, were a bit excessive. It reminds of the Lawnmower man movie if that isn't too random. Typical horror novel for me, in that it makes no sense and you feel cheated. Glad it was fairly short.