This is Goodreads review #1000 for me, and what a great book to mark that milestone with! I do love a haunted house story, and this one is so simply told, and so compact, that it's a pleasure to read. The horror just slowly creeps up and creeps up, and if the identity of the woman in black doesn't really come as much of a surprise, the end itself is a shocker. But most of all this book succeeds in the atmosphere of its setting - isolated Eel Marsh House, out on the shifting sands of the marshes, surrounded by sea and sand, at once both beautiful and terrible. Only accessible by causeway, Eel House is attractive enough to lure in visitors, while the locals know enough to keep away, because something that beautiful and that starved is fertile ground for drowning, and the quicksand around it is always hungry.