Reddit mentions of Seeing the Big Picture: Business Acumen to Build Your Credibility, Career, and Company

First, congratulations!

It's different work and while it's still technical it's now about people but it can be learned. Find a mentor who is not your boss. Seriously. It's good to have one or more advocates in the organization because there are limits to what "push" vs "pull" can achieve but it's their advice that you need to reduce your mistakes and effectively review them afterward.

I'll add to the book recommendations already here (The Phoenix Project, Team of Teams, Leaders Eat Last) and suggest:

• Peopleware by DeMarco, et. al.
  
• Drive, by Pink
  
• Influence, by Cialdini
  
• Seeing the Big Picture, by Cope
  
• Getting to Yes, by Fisher
  
• Behind Closed Doors, by Rothman & Derby (efficiently summarizes a dozen other books).
  
• The Hard Thing About Hard Things, by Horowitz. (your boss probably read this, get insight into their thinking)
  
  Good luck!