SPOILER ALERT!
THE BIG FOUR

Well this book fails everything Agatha has written before or after. It seems this book was in a hurry to get something out on a dealine or ... maybe it wasn't written by her (?). It's predictable, pointless and very far-fetched. I think this was the book someone read and then it was inspired to do 007. If you like james bond movies then read this book ... there is no point reading if you don't like James Bond.
Saying that read another book by her if you want to start reading Agatha Christie novels... I have made some reviews on my blog. Search them.