Author
Garth Nix
5 books here

Sabriel
Young adult · ages 14–18 · 810L · 2008
A genuinely dark coming-of-age fantasy that doesn't shy from death or dread but earns emotional weight through character; Sabriel's voice and the system of magic are unforgettable.

Shade's children
Young adult · ages 12–16 · 820L · 2007
Dark, sophisticated fantasy-adventure that takes the premise (created beings hunted by machines) seriously and uses it to interrogate identity and friendship; unrelenting pacing and real stakes, but emotionally earned rather than gratuitous.

Drowned Wednesday
Middle grade · ages 9–12 · 780L · 2005
A darker, architecturally intricate fantasy that rewards close readers and doesn't talk down to its audience; the sickbed-to-hero arc is genuinely earned and complicated.

The Left-Handed Booksellers of London
Young adult · ages 14–18 · 820L · 2021
A sharply written urban-fantasy mystery with a nonbinary protagonist and queer romance; strong worldbuilding and atmospheric London magic, though the plot meanders slightly in the middle.

Abhorsen
Middle grade · ages 12–16 · 780L · 2010
A genuinely unsettling dark-fantasy trilogy that respects middle-grade intelligence—Lirael's fear is the point, not a flaw to overcome quickly, and the death magic worldbuilding is baroque and genuinely eerie.