Slaves of Ijax — John Russell Fearn

A scientist's vengeance propels Peter Curzon seven hundred years into the future, where he finds himself in a very mysterious world. Science has banished the need to work in order to earn money, and people only pursue activities as a vocation and by choice. But everyone is also engaged on a Great Task--constructing gigantic towers, with no discernible purpose, following the orders given to them in the temples of Ijax, a mysterious Buddha-like entity worshipped as a god. Peter alone seems immune to the influence of Ijax, and unless he can penetrate to the root of the mystery, mankind appears to be doomed. Another grand sci-fi adventure from the golden age.