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Countdown
Tuesday, September 29, 2026 · 112 days away
Countdown
Rebecca Yarros - Untitled Empyrean (Not Book Four)
Reminders
Event overview
Companion novel in the Empyrean (Fourth Wing) universe. Available for preorder.
Editorial context
'Untitled Empyrean (Not Book Four)' is a companion title in Rebecca Yarros's Empyrean fantasy-romance series, with a hardcover release scheduled for September 29, 2026 by Red Tower Books (an imprint of Entangled Publishing). Yarros has publicly clarified that this is a side project distinct from the main-series Book 4, which is expected no earlier than late 2027. The Empyrean franchise — opening with 'Fourth Wing' (May 2023), 'Iron Flame' (November 2023), and 'Onyx Storm' (January 2025) — has been a phenomenon in the 'romantasy' subgenre, with 'Onyx Storm' selling over 2.7 million copies in its first week per Circana BookScan, the fastest-selling adult novel of the decade in the U.S. A Prime Video adaptation co-developed with Yarros and Michael B. Jordan's Outlier Society is in development.
Manually verified sources
Last manual verification: 2026-05-11. This note adds context only; the source trail below still controls date confidence.
Confirmation checklist
Source trail
Primary source
amazon.com
Last reviewed
2026-04-30
Tracker status
confirmed
Date precision
Single-date event without a reliable public start time; date-first countdown only.
Schema posture
Event structured data is emitted because the record is single-date and scheduled or confirmed.
Primary citation
Freshness and review
Operational detail
Weak-date handling
Background
A detailed editorial write-up for Rebecca Yarros - Untitled Empyrean (Not Book Four) is being prepared. In the meantime, see the primary source for the most current information.
Date confidence
Rebecca Yarros - Untitled Empyrean (Not Book Four) is marked confirmed in the tracker because the date is backed by the linked source. Times, venues, and operational details can still change, so the source remains the final planning reference.
Source
https://www.amazon.com/Untitled-Empyrean-Not-Book-Four/dp/168281808XStructured data posture
This page emits Event structured data because the tracked record has a single scheduled or confirmed date. The linked source remains the final reference for time, venue, and operational changes.
Countdown evidence
Retention class
Date-first scheduled countdown
Evidence score
7/10 record signals
City-page readiness
Held to date-first
Planning notes
Source reviewed Apr 30, 2026. The countdown record is marked confirmed, but source pages can still change time, venue, access, or operational details.
Live values rendered at Jun 3, 11:50 AM UTC.
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