The book "Tools of the Night Tetralogy" is a fantastical story about how humans learned to use technology to create devices that can help them survive in post-apocalyptic conditions. The story takes place in a world where a catastrophic event known as the "Great Transition" has caused widespread destruction and chaos, leaving only a few scattered groups of survivors. The protagonist, a young woman named Lena, discovers an ancient underground laboratory where she finds a collection of strange and mysterious tools that have the power to manipulate the fabric of reality. With the help of these tools, Lena and her allies must navigate the dangerous and ever-changing landscape of their new world, all while trying to understand the true nature of the Great Transition and the forces that are driving humanity towards extinction. As they journey through this treacherous landscape, Lena and her companions encounter various factions vying for power and resources, each with their own unique technologies and beliefs. They must learn to adapt and evolve in order to survive, but also to unite the warring factions and prevent the complete annihilation of humanity. Along the way, they discover hidden secrets about the past and the true nature of the Great Transition, which threaten to upend everything they thought they knew about their world.

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