The Personal Portable Library in its most simple form is a hard drive or USB stick containing a large collection of e-books, curated, archived and indexed by an individual user. The flourishing of the offline digital library is a response to the fact that truly private sharing of knowledge in the online realm is increasingly made impossible. While P2P sharing sites and online libraries with downloadable e-books are precarious, people are led to an atavistic and reversalist workaround. The radical tactics of the offline: abandoning the online for more secure offline transfer. Taking inspiration from ancient libraries as copying centers and Sneakernet, Henry Warwick describes the future of the library as digital and offline. Radical Tactics of the Offline Library traces the history of the library and the importance of the Personal Portable Library in sharing knowledge and resisting proprietarian forces.