About Ultimate Ending Books


Remember the old Choose Your Own Adventure books of the 80’s and 90’s? They were cool. Fun. Sometimes even challenging.

But they weren’t always coherent.

Ultimate Ending books take Choose Your Own Adventure to the next level!

Each book in the Ultimate Ending series features exciting plots and detailed stories, with bigger worlds and richer characters. Best of all they feature clever riddles and challenging puzzles, and hidden within every story, one truly Ultimate Ending!

How They Work


CYOA Written with Kids AND Adults in mind!


Ultimate Ending books are geared toward children and teens, but with compelling stories and a writing style that adults would also enjoy. They contain only mild violence, and put an emphasis on creative problem solving. There are riddles to figure out, cryptograms to solve, and visuals based on artwork. Some solutions involve minor math equations. All of the solutions involve fun!

UE1 – TREASURES OF THE FORGOTTEN CITY

Ultimate Ending Book One

Book one: Treasures of the Forgotten City


Three priceless star jewels. A century-old, cryptic journal.

Using only the resources left by your grand-uncle, it’s up to you to find Atraharsis — the legendary lost city beneath the sands.

But the way won’t be easy. Raging sandstorms, sinister traps, and a whole host of mysteries stand between you and your Ultimate goal.
Can you solve the riddles, and recover the fabled star gems in time?

Or will you — like so many who’ve gone before — become the next permanent resident of the forgotten city?

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UE2 – THE HOUSE ON HOLLOW HILL

The House on Hollow Hill

Book two: The House on Hollow Hill


After a hundred years of standing tall and alone, tomorrow the House on Hollow Hill will be bulldozed. Yet the owner, Mr. Goosen, is giving you one last chance to explore inside and take one treasure of your choosing!

With your friends Jake and Emma, you have one final chance to explore the house and find the best treasure from one of Mr. Goosen’s many adventures. But you quickly learn the House on Hollow Hill has a secret.

Can you survive the house’s ghastly occupants?

Or will you ultimately fall victim to their tricks?

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UE3 – THE SHIP AT THE EDGE OF TIME

UE3 - The Ship at the Edge of TIme

Book three: The Ship at the Edge of Time


A derelict ship floats empty in space, harboring a dark secret.

You are Andon Mercer, space marine. Along with your co-pilot Serena, the two of you must board the Dauntless and solve the strange mystery of her frozen, haunted corridors.

Yet those corridors might not be so empty. Not when the source of the derelict ship’s troubles unexpectedly returns.

Can you find out what happened to the ship and its crew? Or will an unknown enemy — alien in origin — return to claim its prize?

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UE4 – ENIGMA AT THE GREENSBORO ZOO

UE4 - Enigma at the Greensboro Zoo

Book four: Enigma at the Greensboro Zoo


A Corporal in the Greensboro City Police Department, you’re one of the top candidates for promotion to Sergeant next month. All you need to do is coast and the job is yours… that is, until the Chief sends you on a mysterious midnight mission to the city zoo.

The power is out and the animals are running amok, but the biggest threat of all might be a beast you didn’t know was locked up.

Can you restore order to the zoo before morning and impress the Chief?

All while discovering what caused the chaos in the first place?

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UE5 – THE SECRET OF THE AURORA HOTEL

UE5 - The Secret of the Aurora Hotel

Book five: The Secret of the Aurora Hotel


For more than a century, the Aurora hotel has been plagued by the restless spirits of another world. So when your cousins Evan and Jenna call upon you for help? Saving your uncle Gus’s hotel becomes your top priority.

A full moon. A raging blizzard on All Hallows’ eve. Level by level, the three of you will need to brave the strange rooms and bizarre corridors that guard the pieces of this hundred-year old puzzle.

Can you unlock the mystery of the Aurora’s chilling origins?

Or will the malevolent forces aligning against you prevail?

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UE6 – THE STRANGE PHYSICS OF THE HEIDELBERG LABORATORY

UE6 - The Strange Physics of the Heidelberg Laboratory

Book six: The Strange Physics of the Heidelberg Laboratory


After studying to get your degree in particle physics, you’ve finally landed your dream job: working in the famed Heidelberg Physics Laboratory, deep beneath the Swiss Alps. You’re pushing the boundaries of physics… until an important test — the search for the elusive Causality Neutrino — goes horribly wrong.

With the connection between space and time shattered, it’s up to you to save the laboratory and its inhabitants. Can you dodge Phase Beings and unstable Neutrinos and prevent the reactor core from melting down?  Or will you, like the rest of the Heidelberg physicists, be forever trapped in spacetime?

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UE7 – THE TOWER OF NEVER THERE

UE7 - The Tower of Never There

Book seven: The Tower of Never There


A date. A time. A set of pinpoint coordinates, and just two words:

COME ALONE.

In the middle of nowhere, an enormous spire materializes before your eyes. But what does it want? And why has it summoned you?

Floor by perilous floor, the answers lie in facing the tower’s strange and often eccentric inhabitants — from both this world and beyond.

Will you reach the top of the Tower of Never There? Or will it ultimately blink away — taking you along with it — before you can manage to unravel its secrets?

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UE8 – SABOTAGE IN THE SUNDERED SKY

UE8 - Sabotage in the Sundered Sky

Book eight: Sabotage in the Sundered Sky


After disguising yourselves and sneaking past security, you and your brother are finally free to enjoy the luxury of the Kensington Airship in peace.

But when disaster befouls the trans-Atlantic blimp, it’s up to you to figure out what – or who – is causing the chaos.

Navigating the airship’s many decks won’t be easy. You’ll need to constantly change disguises to avoid security, and the slightest misstep may result in the airship’s total destruction!

Will you be able to solve the sabotages in the sundered sky?

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UE9 – RESCUE FROM THE VALLEY OF CHAOS

UE9 - Rescue From the Valley of Chaos

Book nine: Rescue From the Valley of Chaos


When your old nemesis goes missing in the jungles of Belize, as a fellow adventurer you’re compelled to help.

But John Sullivan isn’t just missing… he might actually be vanished from the face of the world!

Can you and your pal Waif navigate the utter pandemonium known only as Elhuatl – The Valley of Chaos?

Or will you both become forever lost – like Sullivan himself – in the shadows of hopeless anarchy?

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