Lyra's Oxford (2003) is a fairly unremarkable short story, set two years after the events of Philip Pullman's The Amber Spyglass. The story's plot is barely explained; the best part about the book were the lovely John Lawrence engravings and the accompanying map of the alternate Oxford Lyra and Pan call home.
Pullman could have done more with this book, and hopefully his next efforts, whether short stories or full novels, will be more developed than this one.