Full backstory and lore of UltimateTale!Sans, includes both versions: Fanon and Canon.

In this book, you will read and find out how this anomalous soul has been born; and further beyond, as other versions, and more.

Volume 0 - Auxiliar Information: Extra, and general, canon information
Volume 1 to 4 - Fanon Backstory
Volume 5 - Canon Backstory
Volume 6 - Fanon inventions
Volume 7 - Fanon War
Volume 8 - Theories and Theory 2 development
Volume 9 - UltSans Versus Doom Slayer
Volume 10 - UltSans Versus Kratos
Volume 11 - Battles and Encounters
Volume 12 - Death Walker: Scorched Seville Shadow
Volume 13 - NM Cataclysm
Volume 14 - L2D
Volume 15 - Ashed's backstory
Volume 16 - Replacement
Volume 17 to 18 - Canonical Fanon present-future story
Volume 19 to 20 - Fanonical Fanon present-future story
Volume 21 to 27 - Delta: Shattered Path
Volume 28 - Spore Storm
Volume 29 - Out-inner connected
Volume 30 to 32 - A mordor-ous lord of the ring
Volume 33 to 35 - Circus of sanity digitalization (Needs rework)
Volume 36 to 40 - Underplayer: Multiversal Collapse
Volume 41 - The Undying Soul
Volume 42 - Determinant to Void
Volume 43 - Vessel&Player

Chapter 94 - - Reject