Originally Posted by orlok
... Sounds less likely than DiapDealer's suggestion. Did you happen to read the book whilst standing on your head?
I too thought that the title was an upsidedown render of "100M" , but in that cleaners on average made it that far from the silo.
I think this first came from the dust cover graphic for #2 (?) as seen in the omnibus for Kindle. This, to me, looked just like 100M upsidedown. But this was unintentional?