Calibre’s latest release introduces a realtime AI-driven interactive fiction mode alongside practical viewer and UI improvements. The feature is optional and requires you to supply an LLM API key.
Create Your Own Adventure mode lets you set up a fictional world and hand control to an AI that advances the story in real time, and it must be enabled with a compatible LLM API key.
The new feature is optional and accessed by adding the 'Create your own Adventure' button via Preferences > Toolbars, then following the setup wizard.
Calibre 9.15 also delivers non-AI improvements: multi-select highlight style changes, hover tooltips for highlighted notes, saved window-size sidebar button, cover-grid emblem corner choice, and several bug fixes.
# What changed in Calibre 9.15
Calibre 9.15 introduces an optional interactive-fiction mode called "Create Your Own Adventure." The mode is AI-driven: you build a fictional world in a setup wizard and an external language model advances the story in real time based on your inputs. The feature started as an internal test of Calibre's AI backend and grew into a user-facing game.
The interactive-fiction mode is optional and depends on you adding an API key for a compatible LLM. That means the feature won't work out of the box unless you provide credentials for a supported model.
# How to enable and use the new mode
Because the mode relies on an external LLM, Calibre treats it like any other AI feature: opt-in and behind user-provided API keys.
# Other changes in 9.15
Calibre 9.15 also includes a mix of user-facing improvements and bug fixes that affect everyday ebook management and reading:
# Context and trade-offs
One viewpoint expressed in the coverage questions whether adding generative-fiction and AI cover-generation tools fits Calibre's core role as an ebook manager. Practical feature requests mentioned as alternatives include AI-assisted sorting, metadata corrections, and generating reading "playlists" based on a user's existing library and tastes. Those are not part of 9.15 but are identified as potentially more directly useful to typical Calibre users.
# Where to get Calibre
Calibre remains free and open source for Windows, macOS, and Linux. The official download page provides the standard installer and a Linux command-line install script that unpacks a binary to a system folder and creates menu shortcuts. A Flathub build exists but is unverified.
# Bottom line
If you want to experiment with an AI-driven, realtime interactive-fiction experience inside your ebook manager you can opt in to the new mode in Calibre 9.15 by supplying an LLM API key. If you prefer focused ebook-management improvements, this update also includes multiple small but practical viewer and UI fixes that affect reading and library layout.
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