This was my first Willis read, and I quite enjoyed it. It's a story about time travel, and the main character goes back in time to the Blitz and is put on the fire watch for St. Paul's cathedral (for some kind of Time Travel U degree - it's basically his final exam).
It was good, Willis handles time travel well. Apparently characters from her novels are in this story, so I will look forward to reading it again after I've read those.
I would have probably enjoyed this story more if I hadn't just read a series of stories/novels that seemed to have sucker punched me emotionally. This story doesn't give me a strong emotional reaction, and so I can't say I really enjoyed it more (though I did enjoy the break).