looking for a book or two

[threeplusfire]

So, maybe the internet can help. When I was about ten, I read some very strange books about post nuclear war worlds. One of them in particular was about a group of kids, and I remember the stories about the dust, about scavenging food in shopping carts, about one of them getting sicker and sicker... they were strange and grim little books. Did anyone else read these? Does anyone know what they are?