The document discusses how personalization can be scaled up in libraries. It presents two case studies from Royal Holloway, University of London on demand-driven e-book acquisition and discovery systems. For e-books, a pilot program allowed users to preview and purchase titles, resulting in a highly tailored selection. For discovery, implementing the Summon system provided a single search across resources but allowed little customization. The document considers how discovery systems and personalization can be improved to provide a more "boutique" service on a larger scale.