The books are in very good condition, the covers protected within clear cellophane. No obvious foxing.
The Subtle Knife has a red spot to the underside of the pages.
There is no particular provenance for the books, they were consigned from a private source.
N.B. The Amber Spyglass has a long inscription on the inside cover,
"To Andy...
... From Auntie".
"There is a circa 1" light brown linear stain to the title page of "Northern Lights"