The author of this provocative book has come to think that the Christian habit of observing Sunday as a day of rest and commemoration of the resurrection leads into so many contradictions and absurdities in this space-age that Sunday, kept in so many ways in the breach even by those who seek to preserve it , has become an obstacle to faith. ""God is God of the whole week, the month, the year, the whole life, and he is God of more than this, God of all, without external or spatial limitations"". He is arguing against ""Sunday morning religion"" which tends to exclude Monday to Saturday worship. He is not asking that Sunday be done away with, but that the Lord's Day be brought into all the other days. He turns freely to the Bible and Christian history to bolster his point that we have missed the meaning of the development of Sunday worship, -- or at least that we have failed to permit its development in the proper direction. If, in this space age, there is to be a special day of Christian observance, it should be a day of the cross, where mass redemption is centered, because only the cross has meaning to the contemporary (suffering) age, and is the best point of reference for communication with modern Space-Age Man, who, because he is estranged from God, cannot conceive of the Resurrection. Even those who will not go along with the author in the practical conclusions of his thesis will agree with much he has to say.