This document discusses patron-driven acquisition (PDA) of ebooks. It provides background on PDA from Rick Anderson's definition. Key benefits of PDA mentioned include increased relevancy for patrons, responsiveness to patron demands, and addressing limits of traditional collection development. The document then examines examples of PDA programs at various libraries and considerations for implementing PDA, such as discovery tools, pre-selection of content, mediation of purchase requests, purchase vs. rental models, and how payments are handled. Challenges of PDA including impact on the educational mission, biases in selection, budget issues, and cataloging are also addressed.