His Dark Materials Trilogy by Philip Pullman
"Lyra is rushing to the cold, far North, where witch clans and armored bears rule. North, where the Gobblers take the children they steal—including her friend Roger. North, where her fearsome uncle Asriel is trying to build a bridge to a parallel world.
Can one small girl make a difference in such great and terrible endeavors? This is Lyra: a savage, a schemer, a liar, and as fierce and true a champion as Roger or Asriel could want.
But what Lyra doesn't know is that to help one of them will be to betray the other...
A masterwork of storytelling and suspense, Philip Pullman's award-winning The Golden Compass is the first in the His Dark Materials series, which continues with The Subtle Knife and The Amber Spyglass."
Hardcovers, minor wear, The Amber Spyglass has small closed tear on jacket cutout, binding tight, pages bright, a very nice set!