There's an online edition. It contains the same content as the commercial version. I am just experimenting with a little different model here for a change to see how it goes.
If you have bought "SurviveJS - Webpack and React", you will receive this book for free once I complete the split. That book will become simply "SurviveJS - React". This will give me room to develop more React specific content.
A part of this books profit (around ~30%) will go to Tobias Koppers, the author of webpack. This book simply wouldn't be possible without him so he more than deserves a cut.
Feedback is welcome. Prefer the GitHub issue tracker for that. You can reach me other ways too. I am particularly interested in what sort of content to develop.
I hope you enjoy the book. If you have read the original one, you probably won't find a lot of new content here. I feel the content is easier to access, though, and there are some nuggets of information you just might not be aware of yet.