This document provides an introduction and overview of bike-share systems. It discusses the history and evolution of bike-share, from the first proposed free system in Amsterdam in 1965 to modern automated systems. The key benefits of bike-share systems are outlined, such as reducing congestion, improving accessibility and public health, and increasing cycling. Successful systems typically have dense station networks, automated docking, wireless tracking, and pricing that incentivizes short trips. The introduction explains that the guide aims to help cities around the world in planning and implementing bike-share.