It's story about brown and black skinned others destroying western civilization with immigration. The motive is racist. The tone of the book is very passionate and overly emotional.

Here is short preface Jean Raspail wrote to his book:

> I HAD WANTED TO WRITE a lengthy preface to explain my position and show that this is no wild-eyed dream; that even if the specific action, symbolic as it is, may seem farfetched, the fact remains that we are inevitably heading for something of the sort. We need only glance at the awesome population figures predicted for the year 2000, i.e., twenty-eight years from now: seven billion people, only nine hundred million of whom will be white. But what good would it do? I should at least point out, though, that many of the texts I have put into my characters’ mouths or pens—editorials, speeches, pastoral letters, laws, news stories, statements of every description—are, in fact, authentic. Perhaps the reader will spot them as they go by. In terms of the fictional situation I have presented, they become all the more revealing.