Inside the Tentacle Cave Books in Order
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The Inside the Tentacle Cave series by Umetane includes 7 books published between 2023–2026.
✓ All 7 books verified against the publisher's official series list.
Publication order
In the order the books were originally released.
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Buy on AmazonInside the Tentacle Cave (Manga) Vol. 1
2023 · Umetane
A Mature-rated dark fantasy tale for Seven Seas' Ghost Ship imprint. Deep in the tunnels of an abandoned mine lurks a demon that absorbs the power of…
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Buy on AmazonInside the Tentacle Cave (Manga) Vol. 2
2024 · Umetane
FROM SEDUCTION TO SUBMISSION! Consuming adventurers and bending female mages to its will, the Black Ooze grows in both power and hunger. Frederica…
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Buy on AmazonInside the Tentacle Cave (Manga) Vol. 3
2024 · Umetane
AN INSATIABLE HORROR GROWS... Fiana and Arfila, Knights of the Queen’s Guard, barely escaped from the slime caverns with their sanity. Regrouping at…
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Buy on AmazonInside the Tentacle Cave (Manga) Vol. 4
2025 · Umetane
A CITY IN RUINS. Our heroines think they have dealt with The Black Ooze once and for all, reducing it to ashes deep within the lascivious cave where…
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Buy on AmazonInside the Tentacle Cave (Manga) Vol. 5
2025 · Umetane
ECSTASY AND DESPAIR With her kingdom lying in ruins, Queen Letitia is now the only defense left for her daughters against the cowardly Slimes. But…
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Buy on AmazonInside the Tentacle Cave (Manga) Vol. 6
2025 · Umetane
A RACE AGAINST SLIME! The kingdom of the elves has been consumed by the Black Ooze, Queen Leticia has been captured, and an army of evil slimes oozes…
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Buy on AmazonInside the Tentacle Cave (Manga) Vol. 7
2026 · Umetane
A RACE TO THE BLADE! As the diabolical, all-consuming Black Ooze ravishes the countryside, Lady Fornelis leads a group of warriors and refugees to…
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✓ = numbering verified against the publisher's official series list.
📅 = publisher-announced release dates; subject to change. All upcoming releases →
Frequently asked questions
What order should I read the Inside the Tentacle Cave books in?
Read them in publication order, starting with “Inside the Tentacle Cave (Manga) Vol. 1”. Start with “Inside the Tentacle Cave (Manga) Vol. 1.”
How many books are in the Inside the Tentacle Cave series?
We list 7 books by Umetane , published between 2023–2026.
When is the next Inside the Tentacle Cave book released?
The next book is “Inside the Tentacle Cave (Manga) Vol. 8”, book 8 in the series, expected Oct 27, 2026. That is the publisher's announced date and can change; this page updates when it does.
Where can I buy the Inside the Tentacle Cave books?
Each title above links to Amazon. See our affiliate disclosure.
Reading order compiled from author/publisher guidance and verified bibliographic data. Spotted a wrong order, a missing book, or any other mistake? and we'll correct it.