Decision trees and you! (well.... me.)

So, one of the truly neat things about this book is how fully-formed it is, even though it's the first choose your own adventure book ever. Each section actually opens with a chart to show players the turns that may happen in our character's path

And when you put it next to the layout in Twine...

It's a little messy, but it's all there!  (Note: the terminal paths all link back to the "chapter select" to accommodate the differences between having the book in your hand.  For completeness' sake, here's Jed and Saunders' choices as well:

Part of what makes this so satisfying is how easy it was to port over - a lot of care and craft went into creating the original book, and really not much has changed in the way of Interactive Fiction, at least when it comes to print media.  Digital IF allows for statefulness - the game tracking your decisions (did you pick that item up? what's in your inventory? etc) but this is still pretty much how choose your own adventure books work.  Super neat stuff.