No library can buy or hold everything its patrons need. At a certain point, librarians need to pool their resources and collaborate to provide access to what they don't have: Collaboration and partnership, centralized and shared collection storage, digitization projects, interlibrary loan and resource sharing, purchase on demand, PDA and EBA are notably key to success. The 2022 edition of the Erasmus Mobility Staff Training week organized at the University of Li\`ege Library focused on services, projects and policies that libraries can deploy and promote to increase and ease access to materials that do not belong to their print or electronic holdings. More than 20 librarians, managers, and researchers in library science share their experiences and visions in this book. Keywords: Collaboration between libraries; Collection Development; Academic Libraries; Research Libraries; Interlibrary Loan; ILL; Resource Sharing; Purchase on Demand; Patron-Driven Acquisition; PDA; Evidence-Based Acquisition; EBA; Alma; Koha; RapidILL; Impala; Subito; Library systems; Digitalization; Workflows

翻译：任何图书馆都无法购买或储藏所有用户所需的资源。当达到一定限度时，图书馆员必须整合资源、开展协作，以提供自身馆藏所欠缺的资料访问途径：合作与伙伴关系、集中化共享储存设施、数字化项目、馆际互借与资源共享、按需采购、PDA（读者驱动采购）及EBA（循证采购）等尤为关键。2022年在列日大学图书馆举办的Erasmus员工流动培训周聚焦于图书馆可部署推广的服务、项目及政策，旨在增进并简化用户对非本馆印刷或电子馆藏资源的获取。本书汇集了20余位图书馆员、管理者及图书馆学研究者的经验分享与见解。关键词：图书馆间协作；馆藏建设；学术图书馆；研究图书馆；馆际互借；ILL；资源共享；按需采购；读者驱动采购；PDA；循证采购；EBA；Alma；Koha；RapidILL；Impala；Subito；图书馆系统；数字化；工作流程