Feed. I mean, yeah, the October Daye series are her masterworks, so yeah, those first three -- Rosemary and Rue, A Local Habitation, and An Artificial Night have everything I love about the O.D. series, but Feed was my entry point, and is still one of my favourites. And if you liked the multi-textured aspect of Ghost in the Shell -- from one perspective, it's a political intrigue thriller, from another, it's a buddy cop movie, from yet another it's a procedural/investigation movie, from yet another, it's a philosophical treatise about what constitutes "life" in a cybernetic world... -- this has all of that in spades...alright, except that last one, but it has its own "philosophical treatise" agenda.