ReleaseTwin
DEStart a book project

THE SAFETY NET FOR EVERY BOOK EDITION

Your book keeps changing.
ReleaseTwin knows what that means.

A book is more than text. Book details, design, cover, images and print settings must match. ReleaseTwin keeps track and explains what to do after a change.

ReleaseTwin in the workspaceHow it works
7monitored source areas
5connected editions
1unambiguous book state
SOURCES01Manuscript02Book details03Design04Cover05Images06Sales details07Print settings
RELEASETWINCURRENT BOOK STATE
EDITIONSUniversal EPUBAmazon KDPApple BooksGoogle PlayPrint book
THE REAL PROBLEM

An export can be correct — and already be outdated.

When a title, cover, price or manuscript changes after export, it is not automatically clear which file, approval or platform is affected. ReleaseTwin compares the current book state with every edition and explains the impact.

CHANGE IMPACTOne change. Clear consequences.
01

The cover is replacedReleaseTwin detects the new cover version.

02

Affected targets are markedStore packages and the print edition are no longer current.

03

Only what is needed is rebuiltepubio automatically assembles the required steps.

04

Approvals remain unambiguousReview, quality check and handoff package belong to the new state.

FROM BOOK STATE TO PUBLICATION

Stop guessing what is still current.

01

Capture

ReleaseTwin represents manuscript, metadata, design, media, market and print data as one book state.

02

Compare

Every EPUB, store and print edition is compared with that exact state.

03

Verify

Content, cover, ebook and print files are checked together for publication.

04

Handoff

epubio creates the right files and guides the upload to a store or printer.

MORE THAN AN EXPORT

The control layer for the entire book.

01

Change radar

Shows which parts of the book have changed since an edition was built.

02

Change overview

Shows whether a change affects ebook, print or several editions.

03

Shared approval

Connects file checks, editorial approval and publishing requirements.

04

Version-bound reviews

An approval only applies to the book state that was actually reviewed.

05

Complete handoff

Creates files, book details and upload guidance together and clearly assigned.

06

Publication status

Documents handoff, external review, requested changes and publication.

WHY RELEASETWIN

Formatting is a step. Publishing is a system.

TaskDisconnected tool workflowepubio with ReleaseTwin
Changes after exportManually determine which files are affectedAutomatically mark each target as current or outdated
ApprovalsOften detached from the generated fileBound to a specific book state
EPUB, stores and printSeveral exports and checklistsOne dependency and approval process
HandoffCollect files and book details separatelyAll required files together and clearly assigned
Errors and blockersInterpret a technical messageShow the reason and required next step
HUMAN CONTROL

The author stays in control.

ReleaseTwin never publishes on its own, never stores external store credentials and does not replace legal, tax or publishing decisions. It gives you an unambiguous, verified basis for those decisions.

Frequently asked questions

Does ReleaseTwin replace EPUB validation?

No. EPUB validation checks the ebook file. ReleaseTwin additionally shows whether that file still matches the current manuscript, cover and print edition.

Will my book be published automatically on Amazon or Apple?

No. EPUBIO prepares the handoff and guides the process. You confirm the binding publication yourself in the destination portal.

What happens after a change?

ReleaseTwin shows exactly which editions and approvals no longer match the current state and which steps need to be renewed.

Is ReleaseTwin only for EPUB?

No. It connects reflowable EPUB, store packages and print-ready output to the same book state.

ONE BOOK. ONE RELIABLE STATE.

From manuscript to publication — without version chaos.

Start a book project

Registration is open.