Entertaining and original novel, in which a secret society of X-Men types is undermined when the protagonist loses her memory and has to find out which of her colleagues turned traitor and did it. I wouldn't call it urban fantasy, though it does have a lot of similarities, because although set in London the city isn't really a character - it's not mentioned much at all, really. But the characters are interesting, the plot is fascinating, and best of all is the tone. There's a good-natured humour running all through this book, as though it's well aware of its own ridiculousness (the oracular duck!) and is still enjoying itself tremendously.

In all fairness, the end does let it down a little. There's a lot of villains-explaining-things like they're out of a Scooby Doo episode, and this is particularly egregious in the case of the traitor, who feels the need to talk talk talk instead of just getting rid of the protagonist like they should have done to begin with.