Delivering Open Access content within ILL processes is an exciting prospect for ILL librarians with deep implications for cost, speed and ability to fill. However, it comes with new knowledge for staff to learn, and challenges to tackle. In this handbook, written in collaboration with Tina Baich, Associate Dean for Collections at IUPUI University Library and ex-Chair of ALA RUSA STARS, we hope to provide explainers and resources as an adjunct to tools such as DeliverOA and EmbedOA.