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Cover of Harley Quinn: Reckoning by Rachael  Allen
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Harley Quinn: Reckoning

Rachael Allen

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Similar in plot structure

These books are ranked using the plot structure labels extracted for Harley Quinn: Reckoning.

Plot structure labels used: dual timelines, flash forward, time jumps, back-and-forth timeline, mystery reveal, slow build, twist reveal, prologue framing, open ending, series setup

Focused on “series setup” where exact label matches exist.

This does not mean the books share the same plot, setting, quality, or difficulty. It means their plot structure embeddings are close.

Cover of The Portal by Kathryn Lasky

The Portal

Kathryn Lasky · 2019 · Tangled in Time

A grieving middle schooler discovers a greenhouse portal to Tudor England and a family mystery tied to Princess Elizabeth.

Semantic match: ranked by plot structure

Distance: 0.0702

Cover of The Frozen People by Elly Griffiths

The Frozen People

Elly Griffiths · 2025 · Ali Dawson

A cold-case detective uses secret time travel to investigate a Victorian murder, but gets trapped in 1850s London.

Semantic match: ranked by plot structure

Distance: 0.0768

Cover of The Fossil by Joshua T. Calvert

The Fossil

Joshua T. Calvert · 2021 · Secrets of Mars

In 2042, investigators chase a vanished archaeologist’s secret across Antarctica and Mars, uncovering a buried truth.

Semantic match: ranked by plot structure

Distance: 0.0806

Cover of The Edge of Forever by Melissa E. Hurst

The Edge of Forever

Melissa E. Hurst · 2015 · The Edge of Forever

A teen time traveler from 2146 races into 2013 to stop a girl’s murder—and maybe save his father, too.

Semantic match: ranked by plot structure

Distance: 0.0832

Cover of Anchored by Bridget E. Baker

Anchored

Bridget E. Baker · 2021 · Anchored

A runaway teen wakes between Earth and a hidden world, where her secret power could save—or doom—both realities.

Semantic match: ranked by plot structure

Distance: 0.0891

Cover of Extinct by R.R. Haywood

Extinct

R.R. Haywood · 2018 · Extracted Trilogy

A rogue team races through twisted timelines to stop a former secret-service chief from causing apocalypse.

Semantic match: ranked by plot structure

Distance: 0.0701

Cover of 20th Century Boys, Band 1 by Naoki Urasawa

20th Century Boys, Band 1

Naoki Urasawa · 2002 · 20th Century Boys [20世紀少年]

Childhood friends reunite when a shared symbol resurfaces, pulling them into a cult mystery tied to catastrophe.

Semantic match: ranked by plot structure

Distance: 0.0753