The secret of Chimneys

Reread, probably 3rd or 4th time. I love this book. Virginia Revel is my idol.
This might be my favorite Agatha Christie.
Yes, there is a murder, but this book is more of a mystery and a thriller.
I like Agatha's books because even though they are mysteries, they can be read and reread again and again without much of the excitement disappearing.