This document discusses various ways that libraries are embracing mobile technologies to better serve patrons. It outlines how libraries are creating mobile-friendly websites and apps, using QR codes and augmented reality, offering collections and reference services via SMS and location-based social networks, lending mobile devices, and providing audio and video instructional content for patrons on the go. The rise of mobile phone and app usage indicates that libraries must meet patrons where they are - on their mobile devices - to remain relevant in the digital age.