For a reader who just finished
Books like City of Thieves
after City of Thieves by David Benioff

Nonfiction
This is an adult literary novel set in WWII Leningrad with graphic wartime violence, starvation, and sexual assault — it is outside the 5–9 age band entirely and inappropriate for the Parentkin user base.
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by Aranka Siegal
Nonfiction · ages 10–14 · grades 5–9 · 840L
A masterwork of Holocaust memoir written in a child's voice—unflinching about fear and loss, but grounded in the texture of ordinary summers, school, and family that make the encroaching darkness undeniable.

by Deborah Hopkinson
Nonfiction · ages 9–12 · grades 4–7 · 680L
Hopkinson's mosaic of real voices makes the Titanic human in a way no single narrative can—kids grasp both the tragedy and the class inequality that sealed third-class fates in minutes.

by Carl Sagan
Nonfiction
A 1980 classic that still holds — Sagan's measured wonder and clarity about the scale of the universe can genuinely shift how a curious 10+ kid sees their place in it.