If you've read Henrik's Scrum and XP from the Trenches or Kanban vs Scrum or Lean from the Trenches, you need to see what he's been helping Spotify do with their engineering culture with scaling agile, lean, devops, culture, A/B experiments.
Two-part animated series depicting Spotify's Engineering culture
Part 1:Part 2:
Scaling Agile at Spotify with Tribes, Squads, Chapters and Guilds
- Henrik's blog
- PDF: dropbox, non-dropbox