This is the source code for the Flexx book, which is published as an ebook on Leanpub (and perhaps as hardcopy via CreateSpace or Lulu).
The book will be available for free at least until Flexx reaches version 1.0.
Links:
- The books landing page: https://leanpub.com/flexx/
- A sample can be read here: https://leanpub.com/flexx/read
Want to help? You can create an issue if you think something is missing (note that at this point a lot is missing ;) ). You can fix typos in the Github user interface and create a "pull request".