For a reader who just finished
Books like Quest for the Tree Kangaroo: An Expedition to the Cloud Forest of New Guinea
after Quest for the Tree Kangaroo: An Expedition to the Cloud Forest of New Guinea by Sy Montgomery · ages 8–12
Same style

by Matt Simon
Nonfiction · ages 8–12 · grades 3–7 · 780L
The funniest animal-science book for this age—Simon's deadpan voice makes parasitism and manipulation genuinely thrilling, and kids walk away actually understanding how coevolution works.

by Sy Montgomery
Nonfiction · ages 8–12 · grades 3–7 · 720L
Montgomery's infectious curiosity and on-the-ground reporting make conservation science visceral and urgent—kids finish this wanting to know how to help, not just what the problem is.

by Jennifer Armstrong
Nonfiction · ages 10–14 · grades 5–9 · 800L
The gold standard for introducing true adventure and moral courage to middle graders — Armstrong's restraint and primary-source integration make a 100-year-old disaster feel immediate and real.
Complementing on scientific method

by Sy Montgomery
Nonfiction · ages 8–12 · grades 3–7 · 720L
Montgomery's infectious curiosity and on-the-ground reporting make conservation science visceral and urgent—kids finish this wanting to know how to help, not just what the problem is.

by Steve Sheinkin
Nonfiction · ages 10–14 · grades 5–9 · 820L
A genuine page-turner that makes nuclear physics and WWII espionage accessible to smart 11-year-olds without dumbing down the science or the moral complexity.

by David Macaulay
Nonfiction · ages 8–12 · grades 3–7 · 720L
Macaulay's masterpiece — architectural history made visceral through illustration and narrative; kids who engage deeply will ask real questions about how things are built.
We'd skip — for now

by Brandon Sanderson
A step up — ages 12–18 · grades 7–12
Skip it if your teen has no patience for detailed worldbuilding or magic-system exposition; Sanderson front-loads explanation in ways some readers find slow.