Yep, we're big believers in hands-on learning and delivering code with this book is a big part of that. I'm not 100% on the idea of one app for all the chapter

Yep, we're big believers in hands-on learning and delivering code with this book is a big part of that. I'm not 100% on the idea of one app for all the chapters. For books we've written and workshops we've delivered in the past, this has actually been more trouble than it's worth, and we ended up adding superfluous content in order to build a cohesive app. We're aiming to have a code base delivered with the app where examples live, but the examples might not always cohere - we'd rather each example best illustrate its content.