Lately, I've come to the conclusion that there are too many writers whose friends and fan clubs don't have the cajones to tell them when their works have major problems. I very much enjoyed the novella that started this post-apocalyptic series, and I think I could have enjoyed the entire 5-book Omnibus much better if someone had bothered to tell the author some things:
1. It shouldn't take 2 days to go down 100 floors of stairs. You shouldn't need to load up canteens and stop halfway down for the night (after having taken a breather halfway to the halfway point). There are people who can race up 100 floors in under 30 minutes. I work on the 14th floor, and my elderly ex-boss with bad knees could get down 14 floors in less than 10 minutes. So don't tell me that it takes an entire day for 2 elderly law officers to get 50 floors down. Just no.
2. People who have been dead for 30 years would no longer look like "bodies" and would not be smelly anymore.
3. Emergency lights aren't going to last for 30 years, especially if they're submerged under water.
4. A random body is not going to float past you in the water after 30 years dead.
5. You cannot hide a whole passel of babies and/or children in silence for 15 years.
I found the original idea of this series to be interesting. However, when you base so much of your series on impossibilities, I just can't recommend it as serious reading material. At least all the books were short.