1. Extreme Programming Explained by Kent Beck
In order to build high-quality software, you need good agile management (e.g. Scrum) and strong technical practices such as XP.
Involve the whole team
Increase technical collaboration through pair programming and continuous integration
Reduce defects through developer testing
Align business and technical decisions through frequent planning and conversation
Improve teamwork by setting up informative, shared workspaces

2. Implementing Lean Software Development by the Poppendiecks
Ideas for implementation of Lean software principles:
Optimize the Whole
Eliminate Waste
Build Quality In
Learn Constantly
Deliver Fast
Engage Everyone
Keep Getting Better
Also see:
Lean Software Development: An Agile Toolkit
Leading Lean Software Development

3. The Wisdom of Crowds by James Surowiecki
Groups of people that are diverse (culture, education, age, ...) can often produce better answers than a group of like-minded experts.

4. Linchpin by Seth Godin
How to make yourself invaluable to your organization:
through continual self-improvement
by differentiating your work and your job
by bringing and expending emotional labour
Being a professional is getting up and doing the things that you love even when you don’t feel like doing them.

5. Switch: How to Change Things When Change Is Hard by Chip and Dan Heath
If you want to change things, you need to address both the intellectual side and emotional side of people and make it easier for them to choose change.
Direct the Rider: Find the Bright Spots, Script the Critical Moves, Point to the Destination
Motivate the Elephant: Find the Feeling, Shrink the Change, Grow Your People
Shape the Path: Tweak the Environment, Build Habits, Rally the Herd

6. Drive: The Surprising Truth About What Motivates Us by Daniel Pink
If you want to introduce change in an organization, it is much easier if you understand what motivates people and tailor the change to those motivations:
Autonomy: I want to control how I do my work
Mastery: I want to get better at what I am doing
Purpose: I want to work on something that is meaningful for me

7. Rework by Jason Fried and David Heinemeier Hansson
Wide-randing series of lessons learned while running 37 Signals on topics such as:
Takedowns Go
Progress
Productivity
Competitors
Evolution
Promotion
Hiring
Damage Control
Culture

8. Scrumban by Corey Ladas
Discusses differences between push and pull systems and advantages to uses one over the other
Provides practical scenarios for moving an iteration-based Scrum system (velocity) to a pull-based Kanban system (cycle time)
See also Henrik Kniberg’s presentation on Scrum and Kanban

9. The Long Tail: Why the Future of Business is Selling Less of More by Chris Anderson
Technology, innovation, and curation have made it possible to build a business based on the long tail of demand
iTunes
Netflix
Pandora
eBay
Amazon

10. The Fifth Discipline Fieldbook: by Peter Senge et al
How to build a learning organization
Systems Thinking
Personal Mastery
Mental Models
Shared Vision
Team Learning

11. Bridging the Communication Gap by Gojko Adzic
By increasing the level and effectiveness of communications, you can greatly reduce project risks.
On software projects, ‘specification by example’ and ‘agile acceptance testing’ help to build a shared mental model and expose weaknesses in assumptions and knowledge early.

12. The Leader’s Handbook by Peter Scholtes
Discusses:
A history of management
Leadership competencies
Systems thinking
Getting things done
Meaning, purpose, direction, and focus
Breakthrough improvement
Measuring improvement, progress, and success
Leading by asking
Performance without appraisal

13. Management 3.0 by Jurgen Appelo
Disclaimer: I haven’t read this one yet but lots of people I follow speak highly of it.
Topics include:
Agile Software Development
Complex Systems Theory
Motivation and Team Organization
Leadership
Learning and Building Competence
Communication
Embracing Change and Adapting