For a reader who just finished
Books like Plato and a Platypus Walk into a Bar (kids ed.)
after Plato and a Platypus Walk into a Bar (kids ed.) by Thomas Cathcart · ages 8–12
Same style

by Randall Munroe
Nonfiction · age 10+ · grade 5+ · 1050L
The most fun a kid can have learning real science — Munroe answers questions like 'what if everyone on Earth jumped at once' with genuine physics, and the stick-figure illustrations make complex ideas instantly graspable.

by Randall Munroe
Nonfiction · 1050L
A legitimately smart book disguised as humor — kids discover that rigorous thinking is funnier than jokes, and accidentally develop comfort with math and physics.

by Simon Singh
Nonfiction · age 10+ · grade 5+ · 1050L
The rare nonfiction book that reads like a thriller — kids who love puzzles or spy stories get hooked on the real mathematics and history without noticing they're learning.
We'd skip — for now

by Betty Jean Lifton
A step up — ages 12–18 · grades 7–12
Skip it if your teen is new to Vietnam War history and needs a gentler entry point; this assumes some baseline context and foregrounds trauma and loss rather than historical overview.