I don't think Christie should have written a different ending at all.  If you don't know the other ending don't read any further.  Christie gave the play a happy ending - if you can have a happy ending after eight people have been murdered!  And the films have followed this ending.  To me the book is just perfect as the wheels of justice have turned full circle.  Perhaps one day another film version will be made with the book ending and if so it will be interesting to see what people make of it. 

True, but remember that one of Christie's main reasons for writing that alternate ending is because hanging wouldn't have worked too well onstage.

The original ending is the best, IMO. Christie's words succeed in building tension and conveying a sense of guilt and apprehension throughout, and it reaches its climax when it comes to her ending. It's also unexpected, which is always nice. ;)

Personally, I think the killer's identity in ATTWN is far less well "clued" than Christie's other "controversial" novels (most famous being Roger Ackroyd and Orient Express). It still plays fair, but it is a lot harder to spot the killer than you'd think.

I was quite shocked when I first read the ending. I've reread the book many times since.

Having grown up watching the early film adaptation starring June Duprez, I was rather astonished when I first read the novel.  However, I think that both are in and of themselves excellent.  I don't think the novel could possibly be any better and is in fact one of my favorite Christie novels.  Realistically, at the time that the novel was adapted, you'd be hard pressed to find a movie studio willing to make a film that ended in such a way.  When Daphne DuMaurier's Rebecca was adapted, several key plot points were altered to make one of the characters and the ending a bit more palatable for audiences.  Yet I love both the novel and the film.  All things considered, the adaptations of this terrific novel could be a lot worse, in my opinion.

I have not yet read the novel but a few months ago I saw the old b/w film one saturday afternoon on BBC 2. I watched it with my Mother who is also a huge Christie fan. However, when the film ended my Mother was surprised and told me that the novel does not end the way the film did. However, just now reading these posts regarding these endings I phoned my Mum and told her that the ending in the film was supposed to be that way - so, mystery solved.

what exactly happens in the original ending i kno only the edited one

Despite the villain's plan being a sort of a Xanatos Roulette, that book is one of the AC books that impressed me much. The theme of morality of blind justice is an interesting one - despite technically being an agent of justice, Wargrave is one of the least sympathetic characters in the novel - most of his victims are more sympathetic then him.

in the original ending vera kills phillip like in the ten little indians poem and then she hangs herself.  the police find the ten bodies in the afterward.