The Crack in Space — Philip K. Dick

In the year 2080 every crisis of a couple of centuries had come to maturity. It was an election year, and Jim Briskin, candidate for President, was trying to solve the unsolvable and appease the unappeasable.

There were tens of millions of people in deep-freeze waiting for better times--and the pressure was on to wake them up or throw them away.

The jiffi-scuttlers which bypassed space to speed travel were breaking down and someone had to find out why fast.

And the racial problem had reached the point where a colored man now seemed likely to be the next chief executive.

Add to that a breakthrough into another sort of space and contact with a long-forgotten ancestral race...and you have a complex, taut, and tremendously exciting science-fiction novel as only Philip K. Dick can write.