I have read all (except '<pending>') below books (apparently 18561 pages), plus unlisted prior versions in case of standards specifications. Books that I don't own, but have read, are not included in the list. I also have not listed the (predominantly software development oriented) books which I read during the first 15 years of my professional career.
The books are subdivided into the following categories:
I have rated all books from a project manager's perspective:
(Encyclopedia)
Essential reading for everybody
Essential reading for (software development) project managers
Background material
Low information density material
Not worth reading
ISBN=0743269519 The 7 Habits of Highly Effective People by Stephen R. Covey (2004, 384 pp)
ISBN=0743287932 The 8th Habit: From Effectiveness to Greatness by Stephen R. Covey (2005, 283 pp)
ISBN=1451626266 The 3rd Alternative: Solving Life's Most Difficult Problems by Stephen R. Covey (2011, 459 pp)
ISBN=0071771328 Crucial Conversations: Tools for Talking When Stakes Are High by Al Switzler, Joseph Grenny, Kerry Patterson, Ron McMillan (2011, 272 pp)
ISBN=1897384556 How to Win Friends and Influence People by Dale Carnegie (2015, 238 pp)
ISBN=0978440749 The Coaching Habit: Say Less, Ask More & Change the Way You Lead Forever by Michael Bungay Stanier (2016, 242 pp)
ISBN=0932633013 Secrets of Consulting: A Guide to Giving and Getting Advice Successfully by Gerald M. Weinberg (1986, 228 pp)
ISBN=0932633528 More Secrets of Consulting: The Consultant's Tool Kit by Gerald M. Weinberg (2001, 216 pp)
ISBN=0143126563 Getting Things Done: The Art of Stress-Free Productivity by David Allen (2015, 352 pp)
ISBN=009950569X Made to Stick: Why Some Ideas Take Hold and Others Come Unstuck by Chip Heath, Dan Heath (2008, 336 pp)
ISBN=0205632645 The Elements of Style: 50th Anniversary Edition by William Strunk, E. B. White (2008, 128 pp)
ISBN=1591845572 The Personal MBA: A World-Class Business Education in a Single Volume by Josh Kaufman (2012, 464 pp)
ISBN=1593373686 Kiss, Bow, Or Shake Hands: The Bestselling Guide to Doing Business in More Than 60 Countries by Terri Morrison, Wayne A. Conaway (2006, 592 pp)
ISBN=0061345016 The Essential Drucker: The Best of Sixty Years of Peter Drucker's Essential Writings on Management (Collins Business Essentials) by Peter F. Drucker (2008, 368 pp)
ISBN=0273721844 Strategy Bites Back: Strategy is far more, and less, than you ever imagined... by Bruce Ahlstrand, Henry Mintzberg, Joseph B. Lampel (2008, 240 pp)
ISBN=0385528752 Switch: How to Change Things When Change Is Hard by Chip Heath, Dan Heath (2010, 305 pp)
ISBN=193088561X Change Management: The People Side of Change by Jeffrey Hiatt, Timothy J. Creasey (2012, 148 pp)
ISBN=1930885504 ADKAR: A Model for Change in Business, Government and Our Community by Jeffrey Hiatt (2006, 146 pp)
ISBN=1628250151 Managing Change in Organizations: A Practice Guide by Project Management Institute (2013, 127 pp)
ISBN=0307887898 The Lean Startup: How Today's Entrepreneurs Use Continuous Innovation to Create Radically Successful Businesses by Eric Ries (2011, 336 pp)
ISBN=0932633439 Peopleware: Productive Projects and Teams by Tom Demarco, Timothy Lister (1999, 245 pp)
ISBN=0201835959 The Mythical Man-Month: Essays on Software Engineering, 20th Anniversary Edition by Frederick P. Brooks (1995, 322 pp)
ISBN=0884271781 The Goal by Eliyahu M. Goldratt, Jeff Cox (2004, 384 pp)
ISBN=0884271536 Critical Chain : A Business Novel by Eliyahu M. Goldratt (1997, 246 pp)
ISBN=<unknown> ICB - IPMA Competence Baseline, Version 3.0 by International Project Management Association (2006, 200 pp)
ISBN=1933890347 Project Manager Competency Development: Framework, Second Edition by Project Management Institute (2007, 81 pp)
ISBN=1628250364 Navigating Complexity: A Practice Guide by Project Management Institute (2014, 102 pp)
ISBN=0113314221 Portfolio, Programme and Project Offices, 2013 Edition by Axelos, Eileen Roden (232, 2013 pp)
ISBN=0113312946 Management of Portfolios, 2011 Edition by Best Management Practice (2011, 180 pp)
ISBN=1935589695 The Standard for Portfolio Management, Third Edition by Project Management Institute (2013, 189 pp)
ISBN=0113313276 Managing Successful Programmes, 2011 Edition by Stationery Office (2011, 276 pp)
ISBN=1935589687 The Standard for Program Management, Third Edition by Project Management Institute (2013, 176 pp)
ISBN=0113310609 Directing Successful Projects with PRINCE2, 2009 edition by Office of Government Commerce (2009, 167 pp)
ISBN=0113315333 Managing Successful Projects with PRINCE2, 2017 edition by Axelos (2017, 400 pp)
ISBN=1935589679 A Guide to the Project Management Body of Knowledge, Fifth Edition (PMBOK Guide) by Project Management Institute (2013, 589 pp)
ISBN=1903494133 APM Body of Knowledge, 5th Edition by Association for Project Management (2006, 179 pp)
ISBN=<unknown> The Personal Software Process (PSP) Body of Knowledge, Version 1.0 by Software Engineering Institute (2008,
74 pp)
ISBN=<unknown> The Team Software Process (TSP) by Software Engineering Institute (2000, 36 pp)
ISBN=0471741876 Project Management: A Systems Approach to Planning, Scheduling, and Controlling by Harold Ph.D. Kerzner (2005, 1040 pp)
ISBN=0470137401 Project Management Communications Bible by William Dow, Bruce Taylor (2008, 807 pp)
ISBN=1935589350 Practice Standard for Earned Value Management, Second Edition by Project Management Institute (2011, 153 pp)
ISBN=1930699476 Practice Standard for Project Configuration Management by Project Management Institute (2007, 53 pp)
ISBN=1935589121 Practice Standard for Project Estimating by Project Management Institute (2011, 79 pp)
ISBN=193389038X Practice Standard for Project Risk Management by Project Management Institute (2009, 116 pp)
ISBN=1935589245 Practice Standard for Scheduling, Second Edition by Project Management Institute (2011, 142 pp)
ISBN=1933890134 Practice Standard for Work Breakdown Structures, Second Edition by Project Management Institute (2006, 111 pp)
ISBN=0113314671 PRINCE2 Agile by Axelos (2015, 356 pp)
ISBN=0201760436 Agile Software Development Ecosystems by Jim Highsmith (2002, 448 pp)
ISBN=0131479415 Agile Estimating and Planning by Mike Cohn (2005, 368 pp)
ISBN=0932633447 Project Retrospectives: A Handbook for Team Reviews by Norman L. Kerth (2001, 268 pp)
ISBN=0113313551 Passing Your ITIL Foundation Exam by Christian F. Nissen (2012, 212 pp)
ISBN=0769523307 Guide to the Software Engineering Body of Knowledge, 2004 Version (SWEBOK Guide) by ISO/IEC/JTC 1/SC 7 (2005, 210 pp)
ISBN=<unknown> Guide to the (Evolving) Enterprise Architecture Body of Knowledge, Draft (EABOK Guide) by MITRE Corporation
(2004, 141 pp)
ISBN=0981129218 A Guide to the Business Analysis Body of Knowledge, Second Edition (BABOK Guide) by International Institute of Business Analysis (2009, 272 pp)
ISBN=0321419499 Mastering the Requirements Process by Suzanne Robertson, James Robertson (2006, 592 pp)
ISBN=1439858349 Business Analysis for Business Intelligence by Bert Brijs (2012, 400 pp)
ISBN=0471081124 Lessons Learned in Software Testing by Cem Kaner, James Bach, Bret Pettichord (2001, 286 pp)
ISBN=0321125215 Domain-Driven Design: Tackling Complexity in the Heart of Software by Eric Evans (2003, 576 pp)
ISBN=0735712026 The Elements of User Experience: User-Centered Design for the Web by Jesse James Garrett (2002, 208 pp)