Three Ghosts for Your Money

In Roman Polanski's film "The Ghost" (renamed "The Ghost Writer" when released in USA; presumably so that that particular audience would be able to understand the title), you get three ghosts. Based on Robert Harris' novel, the naive unnamed narrator is appointed to ghost write the memoirs of Adam Lang, ex-prime minister of the UK. Lang is taking refuge at the holiday home of his publisher, on Martha's Vineyard, whilst charges of war crimes are being levelled. Our second ghost is the previous ghost writer, Mike McAra, who drowned in suspicious circumstances following a row with Lang. The third ghost is the UK prime minister, who has ghost-written the justifications for invading Iraq, in support of the US president. This film has a worrying credible plot and a curious twist at the end. What was not credible to me was why our narrator would reveal what he discovers near the end of the story and so put himself in such jeopardy. A desire to show off your deductive powers for me would be outweighed by a desire to survive.