What books are similar to The Killer's Cousin?

The 10 closest matches to The Killer's Cousin by Nancy Werlin on ReadingList include I Must Betray You, The Princess and the Grilled Cheese Sandwich, Breathing Underwater, Danger Zone, and Define "Normal". Each is scored on shared themes, shared award lists, genre, and reading level (grades 9–12), and links to the curricula, states, and grades where it is assigned in US schools, with primary sources.

Are books like The Killer's Cousin reading-level appropriate?

Yes — every match is a reading-level match, not just a topical one, scored on Lexile and grade band (grades 9–12), so the picks stay grade-appropriate. See how ReadingList judges text difficulty on the /standard methodology page.

How does ReadingList choose similar books?

Matches are ranked by shared themes, shared award and reading-program lists (two books picked for the same state award were chosen by the same committees for the same readers), same genre, comparable Lexile and grade band, and publication decade — computed from cited public curriculum data, not editorial opinion or AI-generated summaries.

Books like The Killer's Cousin

If you liked The Killer's Cousin, read I Must Betray You, The Princess and the Grilled Cheese Sandwich, or Breathing Underwater — the closest matches in our database, matched on shared award lists and reading level.

Looking for books like The Killer's Cousin by Nancy Werlin (Realistic Fiction · grades 9–12)? The 10 titles below are the closest matches in the ReadingList database — each scored on shared themes, shared award lists, genre, and reading level, and each linked to the curricula, states, and grades where it’s assigned, with primary sources.

These are reading-level matches, not just topical ones — so the picks stay grade-appropriate for a grades 9–12 reader. See how we judge text difficulty on our methodology page.

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Why each is a match

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I Must Betray Yougrades 9–12: Both on the Maryland Black-Eyed Susan Book Award list, same genre (Realistic Fiction), and overlapping grades (9–12). Amazon → books like this →
The Princess and the Grilled Cheese Sandwichgrades 9–12: Both on the Maryland Black-Eyed Susan Book Award list, same genre (Realistic Fiction), and overlapping grades (9–12). Amazon → books like this →
Breathing Underwatergrades 9–12: Both on the Maryland Black-Eyed Susan Book Award list, same genre (Realistic Fiction), and overlapping grades (9–12). Amazon → books like this →
Danger Zonegrades 6–9: Both on the Maryland Black-Eyed Susan Book Award list, same genre (Realistic Fiction), and overlapping grades (6–9). Amazon → books like this →
Define "Normal"grades 9–12: Both on the Maryland Black-Eyed Susan Book Award list, same genre (Realistic Fiction), and overlapping grades (9–12). Amazon → books like this →
Don’t You Dare Read This, Mrs. Dunphreygrades 6–9: Both on the Maryland Black-Eyed Susan Book Award list, same genre (Realistic Fiction), and overlapping grades (6–9). Amazon → books like this →
Drums, Girls & Dangerous Piegrades 6–9: Both on the Maryland Black-Eyed Susan Book Award list, same genre (Realistic Fiction), and overlapping grades (6–9). Amazon → books like this →
Everything, Everythinggrades 9–12: Both on the Maryland Black-Eyed Susan Book Award list, same genre (Realistic Fiction), and overlapping grades (9–12). Amazon → books like this →
Girl, Stolengrades 9–12: Both on the Maryland Black-Eyed Susan Book Award list, same genre (Realistic Fiction), and overlapping grades (9–12). Amazon → books like this →
Hanging on to Maxgrades 9–12: Both on the Maryland Black-Eyed Susan Book Award list, same genre (Realistic Fiction), and overlapping grades (9–12). Amazon → books like this →

Books like The Killer's Cousin for younger readers (K–2)

Closest matches whose grade range overlaps K–2— same scoring, different audience.

Mr. Fox's Game of "No!" by David LaRochelle · grades K–3 — Both on the Maryland Black-Eyed Susan Book Award list, same genre (Realistic Fiction), and the same era (2020s).
Norman Didn't Do It! by Ryan T. Higgins · grades K–3 — Both on the Maryland Black-Eyed Susan Book Award list, same genre (Realistic Fiction), and the same era (2020s).
The Barnabus Project by Terry Fan · grades K–3 — Both on the Maryland Black-Eyed Susan Book Award list, same genre (Realistic Fiction), and the same era (2020s).
There's a Ghost in This House by Oliver Jeffers · grades K–3 — Both on the Maryland Black-Eyed Susan Book Award list, same genre (Realistic Fiction), and the same era (2020s).
Cat Secrets by Jef Czekaj · grades K–3 — Both on the Maryland Black-Eyed Susan Book Award list and same genre (Realistic Fiction).

Books like The Killer's Cousin for elementary readers (grades 3–5)

Closest matches whose grade range overlaps 3–5— same scoring, different audience.

Astronaut Academy: Zero Gravity by Dave Roman · grades 4–8 — Both on the Maryland Black-Eyed Susan Book Award list, same genre (Realistic Fiction), and the same era (2020s).
City Spies by James Ponti · grades 4–6 — Both on the Maryland Black-Eyed Susan Book Award list, same genre (Realistic Fiction), and the same era (2020s).
Dogtown by Katherine Applegate & Gennifer Choldenko · grades 3–6 — Both on the Maryland Black-Eyed Susan Book Award list, same genre (Realistic Fiction), and the same era (2020s).
Eerie Tales from the School of Screams by Graham Annable · grades 4–8 — Both on the Maryland Black-Eyed Susan Book Award list, same genre (Realistic Fiction), and the same era (2020s).
Gracie Under the Waves by Linda Sue Park · grades 4–6 — Both on the Maryland Black-Eyed Susan Book Award list, same genre (Realistic Fiction), and the same era (2020s).

Books like The Killer's Cousin for middle school (grades 6–8)

Closest matches whose grade range overlaps 6–8— same scoring, different audience.

Astronaut Academy: Zero Gravity by Dave Roman · grades 4–8 — Both on the Maryland Black-Eyed Susan Book Award list, same genre (Realistic Fiction), and the same era (2020s).
Attack of the Black Rectangles by A. S. King · grades 6–8 — Both on the Maryland Black-Eyed Susan Book Award list, same genre (Realistic Fiction), and the same era (2020s).
City Spies by James Ponti · grades 4–6 — Both on the Maryland Black-Eyed Susan Book Award list, same genre (Realistic Fiction), and the same era (2020s).
Dogtown by Katherine Applegate & Gennifer Choldenko · grades 3–6 — Both on the Maryland Black-Eyed Susan Book Award list, same genre (Realistic Fiction), and the same era (2020s).
Eerie Tales from the School of Screams by Graham Annable · grades 4–8 — Both on the Maryland Black-Eyed Susan Book Award list, same genre (Realistic Fiction), and the same era (2020s).

Books like The Killer's Cousin for high school & teens (grades 9–12)

Closest matches whose grade range overlaps 9–12— same scoring, different audience.

If You Come Softly by Jacqueline Woodson · grades 9–12 — Both on the Maryland Black-Eyed Susan Book Award list, same genre (Realistic Fiction), and overlapping grades (9–12).
My Sister's Keeper by Jodi Picoult · grades 9–12 — Both on the Maryland Black-Eyed Susan Book Award list, same genre (Realistic Fiction), and overlapping grades (9–12).
Someone Like You by Sarah Dessen · grades 9–12 — Both on the Maryland Black-Eyed Susan Book Award list, same genre (Realistic Fiction), and overlapping grades (9–12).
The Compound by S. A. Bodeen · grades 6–9 — Both on the Maryland Black-Eyed Susan Book Award list, same genre (Realistic Fiction), and overlapping grades (6–9).
The Silver Kiss by Annette Curtis Klause · grades 9–12 — Both on the Maryland Black-Eyed Susan Book Award list, same genre (Realistic Fiction), and overlapping grades (9–12).

Common questions

What books are similar to The Killer's Cousin?: The 10 closest matches to The Killer's Cousin by Nancy Werlin on ReadingList include I Must Betray You, The Princess and the Grilled Cheese Sandwich, Breathing Underwater, Danger Zone, and Define "Normal". Each is scored on shared themes, shared award lists, genre, and reading level (grades 9–12), and links to the curricula, states, and grades where it is assigned in US schools, with primary sources.
Are books like The Killer's Cousin reading-level appropriate?: Yes — every match is a reading-level match, not just a topical one, scored on Lexile and grade band (grades 9–12), so the picks stay grade-appropriate. See how ReadingList judges text difficulty on the /standard methodology page.
How does ReadingList choose similar books?: Matches are ranked by shared themes, shared award and reading-program lists (two books picked for the same state award were chosen by the same committees for the same readers), same genre, comparable Lexile and grade band, and publication decade — computed from cited public curriculum data, not editorial opinion or AI-generated summaries.

Book data last updated 2026-09-05. Matches are computed from each book’s cited attributes — see the methodology.

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