A Swiftly Tilting Planet
by Madeleine L'Engle
Young adult · ages 10–14 · grades 5–9 · 820L · 278 pages · 1981
Why we'd hand it over
A philosophically dense time-travel epic where the stakes are genuinely global and the prose demands close reading; darker and more demanding than *A Wrinkle in Time*, but rewarding for readers ready for L'Engle's full cosmology.