For a reader who just finished
Books like King Solomon's Mines
after King Solomon's Mines by H. Rider Haggard · ages 10–14
Same style

by J.R.R. Tolkien
Young adult · ages 12–18 · grades 7–12 · 1050L
The foundational fantasy epic — dense prose and a sprawling cast will test a 12-year-old's stamina, but kids who can stick with it experience the architecture of an entire imagined world and the rare pleasure of a book that respects their intelligence.

by Terry Pratchett
Young adult · ages 10–14 · grades 5–9 · 920L
Pratchett's most emotionally grounded Discworld novel—Tiffany's choice to refuse supernatural temptation in favor of her own calling lands harder than any romance, and the prose does real work making fairyland both beautiful and genuinely unsettling.

by Tamora Pierce
Young adult · ages 10–14 · grades 5–9 · 850L
The foundational gender-nonconforming fantasy adventure — Alanna's defiance is earned, not preached, and the friendships feel genuine enough that rereads still sting.
Stretch them up

by Homer
Young adult · ages 12–18 · grades 7–12 · 1200L
A foundational epic with real bite—the supernatural menace and maritime peril land, the politics of honor and homecoming still sting, and most 12+ readers surprise themselves by wanting to know what happens next.

by Henrik Ibsen
Young adult · 1100L
A philosophical puzzle wrapped in a sprawling picaresque—Peer's journey from arrogant youth to regretful old man interrogates identity and self-deception in ways that reward re-reading and discussion, though the nonlinear plot and archaic verse demand patience.
Complementing on courage

by J.R.R. Tolkien
Young adult · ages 12–18 · grades 7–12 · 1050L
The foundational fantasy epic — dense prose and a sprawling cast will test a 12-year-old's stamina, but kids who can stick with it experience the architecture of an entire imagined world and the rare pleasure of a book that respects their intelligence.

by Roald Dahl
Middle grade · ages 8–12 · grades 3–7 · 730L
Dahl at his best — hilarious, genuinely thrilling, and quietly heartbreaking about what it means to be small and unwanted in a world built for giants.

by Roald Dahl
Middle grade · ages 8–12 · grades 3–7 · 730L
Dahl at his darkest and funniest—witches are genuinely menacing, the stakes feel real, but the boy's scrappy resourcefulness and the grandmother's rock-solid love make it empowering, not traumatizing.
We'd skip — for now

by Brandon Sanderson
A step up — ages 14–18 · grades 9–12
Skip it if your teen has experienced trauma tied to abandonment or parental death and isn't ready for a character processing those wounds in high-stakes fantasy.