Surprisingly good. I read the majority of this book in one day and I had no idea how it was all pulled off until the very end. Has definitely got me interested in reading more Agatha Christe.
Wow! Dame Christie was a very very clever lady. I've always admired her books but I'd never read this one before and it was a thrilling mystery with twists and turns from start to finish. I didn't guess the identity of the murderer until the last few pages of the epilogue.
Being my first Agatha Christie book, this definitely left me with a good impression of her writing. It kept me guessing the entire time, and in the end I was still wrong.
I really loved this book and would recommend this to almost anyone. There were a lot of twists and everything fits together so well even if you don't see it until the end. It's a book worth reading for a second time.