My Undertale Books
14 stories
Waning Moon by CatOppp
CatOppp
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Nightmare has been fighting for a very long time. He fights to uphold a one-sided balance. He fights to protect the few who stand beside him. Most of all, Nightmare fights so that he'll never be weak ever again. But the Guardian of Negativity is getting tired. Nightmare is not sure if he can fight for much longer. Started 11/5/2024
Pint-Sized  by CatOppp
CatOppp
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Ink was supposed to be attending a meeting to discuss a peace treaty. Instead, he is lying bleeding and battered in a dirty alleyway. When did everything go so wrong? Ink can't fix this. He is not strong enough. His hope is reborn when a tiny creature wanders into the ally and spots the God of Creation.
Little Nightmares  by CatOppp
CatOppp
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Horror's choice to fight for Hearts and a better future has changed something in the people around him. Everyone hopes for redemption, but change is difficult and hard to hope for. Nightmare will have to decide if he's willing to change all that he is for the good of someone else. Can the worst person really change? This is the second book in the Storyverse series Published October 2022
Lost Soul: Extras  by CatOppp
CatOppp
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This book is a collection of backstory from the same universe as my book "Lost Soul". I strongly recommend reading that one first. It will now be marked as complete, but I may come back and add more to it later.
The Stray  by CatOppp
CatOppp
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Dust isn't a very stable monster. Now that everything around him is unstable and changing, he is having a hard time making sense of the world. While trying satiate his drive for LV, a new, strange connection enters his life.
Lost Soul by CatOppp
CatOppp
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Sans doesn't remember a time when he had his own name. He always wakes up as a Sans, but everything else is constantly changing. He is an observer meant to simply watch the AUs, not change them. He has believed this for a very long time. When Sans begins to learn more about his Multiverse, and the problems in it, the burning urge to protect is reignited. How can a nameless, bodiless spirit change anything? The entire Multiverse may just depend upon him figuring it out.
These Lonely Depths  by CatOppp
CatOppp
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    Parts 5
The sever injury to Horror's head forever changed his life. Facing the same possibility again, for someone he's just begun to care about, is now threatening to trap him forever in the lonely depths of his own buckling mind. Book one in StoryVerse Published: February 28, 2022
Alternate Gods  by CatOppp
CatOppp
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Did you ever wonder how different Omniverses might twist the story? Well, I have, and here they are. This is the 4.5 book in this series, but start here if you want XD This description will be changed eventually...... First part published: September 19, 2022 (Cover pending)
HybridTale (Hiatus) by CatOppp
CatOppp
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    Parts 27
The war between MONSTERS and HUAMNS put the SKELETON clan right in between. They allied with the HUAMNS and remained on the surface before being wiped out. The MONSTERS have gathered six HUMAN souls. They cannot be allowed to break the barrier. A/N I do not own Undertale or its original characters. What I do own is HybridTale's plot and character changes. Chapters 1-27 posted January 29, 2022
God of Lost Stories by CatOppp
CatOppp
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    Parts 14
Alloy, the God of Balance, has been sent to a new Multiverse to try and heal the damaged caused by the Deity of the Fate. The Monsters he meets share the faces of his friends, but their stories are not the same. He'll need as much luck as he can get to survive a whole new onslaught of stubborn gods and untold secrets. Published: November 30, 2021