"Well, first of all, " said the BFG, "human beans is not really believing in giants, is they? Human beans is not thinking we exist."
Sophie discovers that giants not only exist, but that there are a great many of them who like to guzzle and swallomp nice little chiddlers. But not the Big Friendly Giant. He and Sophie cook up an ingenious plot to free the world of troggle-humping -- forever.