The subject had fascinated him, and he found enough in it to engross his powers without travelling beyond its limits for diverting episodes, as he does more or less in all the rest of his tales.

The diverting episodes in _Robinson Crusoe_ all help the verisimilitude of the story.
When, however, the ingenious inventor had completed the story artistically, carried us through all the outcast's anxieties and efforts, and shown him triumphant over all difficulties, prosperous, and again in communication with the outer world, the spirit of the iterary trader would not let the finished work alone.

The story, as a work of art, ends with Crusoe's departure from the island, or at any rate with his return to England.

Its unity is then complete.

But Robinson Crusoe at once became a popular hero, and Defoe was too keen a man of business to miss the chance of further profit from so lucrative a vein.