The Doomsday Men

The Doomsday Men was written by Kenneth Bulmer, and published in 1965.  This is a novel that examines what it's like to live in a city that's under the shield of a protective dome, and the consequences of isolationism:

"How can we stop this country from sinking into final degradation and decadence?  You all know how everyone is going sour, rotten, the filthy practices, the murders, the seething violence, not only in the city--where thank God we can exercise a measure of control--but now seeping into the clean countryside.  We are so introverted, so much a part of our own cesspit, that we are all doomed unless we can let in the fresh clean air of the outside world!"

It's also a future/noir detective yarn, where the detectives have the technology to connect with the dying brains of murder victims, and invade their minds a la the movie Inception.  They get to relive their death and solve crimes; only some people have decided to sell the technology to young criminals so they can replay the deaths for kicks....Bulmer crafts a pretty cool book here, a little dated in a mid-60s mod squad kinda way, but rewarding nonetheless.