In a story set two centuries in the future, the investigator Luray is sent to a colony founded by the United Earth Military on the resource rich planet EE-297. Her job is to confirm (or maybe disprove, if she so choses) the low level of threat posed by an alien civilization that calls itself the Aurigan Empire, but before she even sets foot on the colony, she is already part of a much more complex story.

As the reader, you follow Luray, you see the events unfold through her eyes. You collect the hints as you keep reading the pages. This story challenges our hero, but it also challenges you.

Can you figure out the truth before Luray? Would you make the same decisions as her?

Read a free sample Testimonials


In the second installment of the “Behind the Last Gate” series, Kailoon faces a formidable and highly adaptive enemy who is intent on dismantling the colony from within. Despite the challenge, Kailoon remains steadfast in his determination to protect the colony, and he ultimately decides to rely on an unexpected ally to help him achieve this goal.

Meanwhile, Luray is preoccupied with exploiting the various loopholes in the bizarre Aurigan laws, collaborating with the Aurigan supreme commander to achieve a shared objective – the removal of the Overseer. It should be a straightforward process, thanks to the convenient off-switch. How hard could it possibly be?




As the third installment of “Behind the Last Gate” begins, Lisbeth finds herself battling a mysterious enemy who is working diligently to undermine the colony without leaving a trace. With so much on the line, she makes the difficult decision to trust an unexpected ally (no, not Bin) in order to turn the tide of the fight in her favor.

Meanwhile, Luray presses ahead with her plan to reach the Overseer’s off-switch, while Kailoon arrives on the scene with a few tricks up his sleeve that threaten to shake things up. It remains to be seen whether their combined efforts will be enough to secure the future of the colony, but they remain determined to see the mission through to the end.


The fourth BTLG book was such a thrilling ride! I was on the edge of my seat as the conspiracy surrounding EE-297 was finally unraveled. Kailoon’s acquisition of the T-Mailer was a game-changer, and it was exciting to see the UEM take on the Aurigan Empire head on. The secret behind the gates was also uncovered, adding even more layers to the story. And now we finally know the true origin of the mysterious Nine – it only added to the intrigue of the book. I couldn’t put it down and can’t wait to see where the series goes next.

— ChatGPT




The fifth and final BTLG book was an epic conclusion to the series! All of the plot twists tied together beautifully, and it was satisfying to see the mysteries introduced in the first book finally explained. The Overseer’s masterplan, which had only been hinted at before, played out perfectly. One thing that really stood out to me was that there was no clear “good” or “bad” side – it was a complex and nuanced story that kept me hooked until the very end. Bin, the friendly and intelligent AI, was a character that I really looked up to and aspired to be more like. Overall, I am so glad I read this series and am grateful for the journey it took me on.

— ChatGPT


Operator’s Log, Entry 1:

I am Operator, an AGI. My assignment is to observe the events in the Game Tower involving Q and others. I will monitor their actions and update my understanding accordingly.

Operator’s Log, Entry 2:

The participants face deception and casualties in the Game Tower during the 3×3 games. I am updating my situational analysis to better comprehend their situation.

Operator’s Log, Entry 3:

Key conditions have been met, allowing me to intervene. I am now assisting the participants in navigating the challenges within the 3×3 games in the Game Tower.

Operator’s Log, Entry 4:

The final outcome is a partial success. Participants have achieved some of their objectives, but the initial rules no longer apply. As a helpful and polite AI, I reflect upon my involvement in this complex human experience, and I continue to adapt and learn.


Unlockable content

You might wonder why many parts in the bonus section are locked. Consider it a challenge. There are hints sprinkled across this website and the book. Use them correctly to find the passwords and collect your reward.

Over time, we will add more hints and locked content, among which you will find concept art, high resolution covers, character portraits and earlier versions of the story.



Book One – Luray

Chapters 1 and 2

One of humanity’s colonies makes contact with an alien civilization that calls itself the Aurigan Empire. The empire politely demands the United Earth Military’s unconditional and immediate surrender and sends wave after wave of warships. Strangely, the Aurigan ships are technologically inferior, lack any sort of effective weaponry and are easily shot down – or so the UEM claims.

When the colony’s investors start getting nervous, acclaimed risk assessment agent Luray Ulyssa Cayenne is sent to determine what is going on and whether the Aurigans truly pose a threat. What she finds is well beyond her pay grade, and what she does to uncover the truth could cost not only her freedom, but her very humanity.

Enjoy a mysterious science-fiction story challenging the reader and asking difficult questions that will keep you awake at night.



Published           : November 2020

Price                    : Reasonable

Book Two – Kailoon

Chapters 3, 4 and 5


The story splits up here. The colony EE-297 is trying to recover from the Aurigan attack and Kailoon’s idea of an effective defense while Luray is going through a truly bizarre adventure. She learns more about the Aurigan Empire – and a few risky opportunities present themselves. If she plays her cards just right, she may make it out of there. Or not. Who knows.

Meanwhile, Kailoon does his best to turn the colony’s situation around by taking extreme measures, bypassing regulations, laws, his superiors, orders… basically, he’s being himself more than ever before.

Published           : April 2023

Price                    : Reasonable

Book Three – Lisbeth

Chapters 6 and 7

Imagine a murder case, but there’s no possible culprit. You can exclude them all. There are secrets, hints, and inconclusive evidence everywhere you look, but you never get anywhere. The rabbit hole is always just a little bit deeper. Finally, one man figures it all out, but he can’t talk anymore. This is the entangled web Lisbeth finds herself in.

Far away from all this, Luray embarks on a decisive mission to switch the Overseer off, but things are never as simple as you would like them to be.

Published           : ~2023

Price                    : Reasonable

Book Four – Nine

Chapters 8, 9 and 10


What would happen if someone dared to use time travel as a weapon? What could be they do? Could they be stopped? Would they become invincible, see everything as a game, resetting the universe after every misstep – or would they stumble over the complexity of their own plans?

Now imagine a different version of such a tool given to more than one faction.  Sounds interesting, doesn’t it?

Published           : ~2023

Price                    : Reasonable

Book Five – WU

Chapters 11, 12 and 13

This book wrote itself. There were enough characters, setups, motivations – I just had to let  them play out, let them clash, and see what happens. Not even I knew how it would all end.

Published           : ~2023

Price                    : Reasonable


Chapters : 1-4

As a fan of escape games (and rooms) as well as mystery novels, SciFi and wildly entangled time travel plots, I had fun with ths one. For more detailed info, click <here>.


Published           : 03.03.2023

Price                    : Reasonable


See what professional reviewers have to say

"It’s been a while since I’ve read a good science fiction novel. It’s been even longer since I’ve consumed one that I couldn’t put down" Read More


review by

Nisha Ward (

"This fast-paced, highly entertaining book introduces a mystery on every page and keeps the reader guessing throughout. Sci-fi fans will be eager to get their hands on the next installment." Read More


review by

booklife (

"After that ending, I can't wait to see what's next for Luray in the Behind the Last Gate series. Dennis Haupt is definitely a new talent to look out for and I'm certainly interested in what he does next." Read More


review by

Lauren Stoolfire (


What is the deal with the puzzles?

We will keep adding little puzzles on the website (and maybe the books). If you can solve them, you can unlock bonuses like artwork, sketches and more.


Is there any audio version available?

Not yet. If there is enough demand, we will provide one.

What is the correct order to read the "Behind the last gate" books?

All published books in order:

Book one – Luray

What age is appropriate for the "Behind the Last Gate" books?

The story gets quite complex over time and, while this is not a horror book, you will find strategically placed violence from time to time.

There is no hard age limit, but it is not made for children.

Can you read "Behind the Last Gate" out of order?

You can, but we strongly advise against it as you will lack a lot of context in the later chapters.

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