There has always been something enigmatic about Cassie. This is one of the things I like in her, and I like it all the more for being, paradoxically, a quality that isn't readily apparent, elusiveness brought to so high a level it becomes almost invisible. She gives the impression of being startlingly, almost childishly open--which is true, as far as it goes: what you see is in fact what you get. But what you don't get, what you barely glimpse: this is the side of Cassie that fascinated me always. Even after all this time I knew there were rooms inside her that she had never let me guess at, let alone enter. There were questions she wouldn't answer, topics she would discuss only in the abstract; try to pin her down and she would skim away laughing, as nimbly as a figure skater.

Tana French