This German antiutopia is the latest in Seabury's series of foreign science fiction. A strike force of scientists from the ""Free World"" invades the mysterious Zone Null. Daniel, one of the interlopers, discovers a perfectly balanced, automated society where computer time is the staff of life. But which is more repressive -- the computerized order of Zone Null or the apparent military dictatorship of the so-called ""Free World?"" Enigmatic but sometimes suspenseful.