Gamebook Engine is a command line utility to create tablet ebooks where the reader can change the story based on its actions and choices
GBE is a command-line tool that takes a specially marked-up book source and compile it into a mobile tablet interactive ebook, just like paperback gamebooks.
With NodeJS 0.10+ installed, you install GBE by executing the following command :
$ sudo npm install -g gbe
After executing this command, you should have a gbe command in your PATH.