For a reader who just finished
Books like The Importance of Being Earnest
after The Importance of Being Earnest by Oscar Wilde

Nonfiction
This is Wilde's Victorian comedy play, not a children's book — wit-dense, structured for stage, and entirely outside the 5–9 age band; if a parent is reading aloud, wait until high school.
Full details →
Same style

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.