This document discusses open access publishing and some of the key challenges. It notes that while open access publishing removes barriers to accessing and sharing scientific research, major publishers currently control the market and charge high subscription fees. This puts strain on library budgets. The document outlines initiatives to increase open access, such as university and funder mandates, and notes that open access journals can have high impact. However, challenges remain around copyright and the ability to fully text mine and reuse content. More advocacy and support for open access is needed to address these issues.