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Stuck in a dull IT job, Liam discovers a secret door on his office building's thirteenth floor that opens into the magical world of Hollowfell. After rescuing an exotic captive, he begins staging heists against the realm's corrupt elite, hauling magical plunder to Earth while assembling an outlaw army.

You'll like it if you enjoy

  • Portal hopping between worlds
  • Heists against corrupt fantasy elites
  • Modern guns brought to fantasy realms
  • A monster-girl found family

Good to know

  • Central harem elements and explicit sexual content
  • Inaccurate firearms handling and bullet physics
  • Low-stakes conflict where obstacles resolve easily

How it ends: The final book delivers a definitive happily-ever-after that readers praise for resolving every major conflict cleanly.

Tags

  • OP MC
  • Found Family
  • Harem
  • Humor Light
  • Lighthearted
  • Epic Length
  • Fast Paced
  • Kingdom Building
  • Portal Fantasy
  • Explicit Content

Reading order

  1. Cover for Looting the 13th Floor 3: A Reverse Portal Fantasy

    Book 1: Looting the 13th Floor 3

    340 pages2022

    The Outlaw King is flush with cash and ready to live large — but the magical world on the 13th floor keeps pulling him back in as rumors circulate of a massive High Society auction of trophy girls, including the rarest monster girl anyone has seen in years.

    Liam cannot let that stand, and his intervention sets off consequences that escalate far beyond a single heist.

    Book 3 deepens the conflict with the High Society and raises the personal stakes for Liam and his growing crew.

  2. Cover for Looting the 13th Floor 4: A Reverse Portal Fantasy

    Book 2: Looting the 13th Floor 4

    348 pages2022

    With his crew thriving in his LA penthouse, Liam decides it is time for his first real vacation — into the snowy far reaches of Hollowfell, where legendary beasts and rare treasures await beyond the territory he has already mapped.

    What begins as a reward trip quickly becomes something far larger as Liam discovers powers he never imagined waiting in Hollowfell's frozen reaches.

    Book 4 opens up the geography of Hollowfell and pushes Liam's capabilities to a new level.

  3. Cover for Looting the 13th Floor 5: A Reverse Portal Fantasy

    Book 3: Looting the 13th Floor 5

    463 pages2023

    Now allied with some of Hollowfell's most powerful beings, the Outlaw King launches his most brutal campaign yet against the High Society monsters — the heists are bigger, the consequences are higher, and ancient secrets about the trophy girls begin to surface.

    With full-time access to the 13th floor finally secured, Liam and his monster girls have no more limits on how far they can strike.

    Book 5 raises the series' mythological stakes while delivering some of its most intense action sequences.

  4. Cover for Looting the 13th Floor 7: A Reverse Portal Fantasy

    Book 4: Looting the 13th Floor 7

    316 pages2023

    The High Society makes their boldest move yet, and it feels like a declaration of war: one of Liam's fiercest allies has gone missing, and the Outlaw King intends to answer with his entire magical army.

    Book 7 is the most intense volume to date, as Liam blasts through monster-infested lairs and discovers just how deeply the conspiracy runs.

  5. Cover for Looting the 13th Floor: A Reverse Portal Fantasy

    Book 5: Looting the 13th Floor

    361 pages2022

    In this series opener, Liam — a bored IT worker — stumbles onto a hidden 13th floor in his office building and discovers a portal into Hollowfell, a stormy magical realm ruled by wealthy monster elites who hoard exotic women as trophies.

    Realizing there are beautiful monster girls to rescue and vast treasures to steal, Liam improvises his way into becoming Hollowfell's most wanted outlaw, raiding the vaults of the High Society while building the beginning of his crew.

    A fun, wish-fulfillment opening that establishes the reverse portal premise, heist-driven adventure, and the found-family dynamic at the series' core.

  6. Cover for Looting the 13th Floor Book 2: A Reverse Portal Fantasy

    Book 6: Looting the 13th Floor 2

    389 pages2022

    With his first heist behind him and his monster girl crew established, Liam sets his sights on the biggest job yet — a massive robbery that will take them deeper into Hollowfell than ever before.

    The riches are piling up: penthouses, luxury cars, and increasingly dangerous magical weapons, but so are the enemies who have noticed the Outlaw King's growing reputation.

    Book 2 expands the world of Hollowfell and raises the stakes, delivering more of the action-heist formula that made the first book click.

  7. Cover for Looting the 13th Floor 6: A Reverse Portal Fantasy

    Book 7: Looting the 13th Floor 6

    342 pages2023

    The uprising is official. Liam's growing legion of followers is ready to reclaim Hollowfell in the Outlaw King's name, but that means going up against the cleverest, most organized faction of High Society monsters yet — and hints of something darker at work in the north.

    Book 6 pivots from heists to outright war, as the series' tone shifts from adventurous to genuinely epic.

  8. Cover for Looting the 13th Floor 8: A Reverse Portal Fantasy

    Book 8: Looting the 13th Floor 8

    319 pages2024

    Victory is within reach — the High Society monsters are fleeing to Hollowfell's farthest corners — but something is wrong. Too many enemies are converging in the same direction, and Liam suspects the secrets of Hollowfell go deeper and darker than anyone imagined.

    The concluding volume delivers on the series' full arc, bringing Liam and his monster girl family to a satisfying, complete ending that readers called a rare achievement in the genre.

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