Great work! :)

The only downside is that the Spotify WEB API doesn't allow playback longer than ~ 30secs.

I know, means it is a bit of a gimmick, but was good fun to build!

>ruined the productivity and general health of a very large number of people.

Please, can you elaborate on this?

I'd recommend this one http://www.amazon.com/Professional-JavaScript-Developers-Nic... And also, keep a beginner's mind :)

Tombstone of a book but it will do the job.