For this episode, we’re joined by David O’Sullivan to talk about his forthcoming book, Computing Geographically: Bridging GIScience and Geography. We talk about how the book came together, what's in it, and also how "computing geographically" fits into the bigger picture of geography, (David's) life, and data. There's lots about David's disciplinary origin story, career trajectory, and how geographical analysis and computation align with the discipline of geography. This is also the episode in which Rachel opens with a comment about our new recording platform and then proceeds to record using her headphone mic, with the result that she sounds as if she's talking into a tin can. Apologies in advance.