@neilhimself well it was a moot point. A day or so after I asked this I went into her room to find her reading it! I was v confused because I hadn't mentioned it to her, but we recently finished watching GO2 and I think she must have known that was you too, wandered past the Folio Society edition of Neverwhere on the bookshelf and your name caught her eye.
She is enjoying it greatly and loves Door! I might try Stardust next.
(It's also a lesson in the value of growing up with a home library.)