"One Dark Window" should come with a trigger warning, "Will wreck your emotions and leave the reader gasping for more".
Our heroine, Elspeth brings a graphic duality between light and dark. There are several storylines running parallel to Elspeth's struggle and it results in a beautifully interwoven narrative around embracing wrong, but for the right reason. A story to highlight how narrow and fine is the line between monstrousness and virtuousness.
The book is very fast paced which made it altogether more enjoyable. Things were happening on the page very quickly and I love that there was little to no indecision that held up the progression of the characters. About a third of the way through, your heart starts to race because you can feel the grains of sand falling through the hourglass and that time is almost up.