The 'dark constellations novel' could cover a multitude of themes. It might be about a group of characters who discover a long - forgotten constellation that has been deliberately hidden from human knowledge because it holds the key to a great danger or a powerful source of magic. The story could follow their journey as they try to understand the significance of this dark constellation, facing challenges from those who want to keep its secrets buried. It could also be a psychological thriller where the constellations are used as symbols to represent the dark corners of the human mind, with the characters' fates intertwined with the patterns in the sky.
Well, without having read the 'dark constellations novel', it might be a story that delves into the darker side of astronomy or the mythology behind constellations. Maybe it tells tales of cursed constellations or the hidden powers they hold. It could also explore the idea of constellations being gateways to other dimensions or having a connection to some sort of ancient evil. There's a whole range of possibilities.
I'm not sure specifically as I haven't read it. It could be about constellations in a dark or mysterious context, perhaps involving secrets, unknown phenomena related to the stars, or some sort of otherworldly events centered around constellations.