This series of books is a must-read for all architects. There is an introduction book that covers each book in the series in about 10 pages and is the first to read. Then read the other ones in whatever order you want. Each book is very short and condensed, and provides great insights into very focused topics, with top industry people for the topic areas authoring the books. It is akin to Cliff's notes you may have leveraged in college as each chapter presents the key points for very famous leadership books by experts in the specific area. Start with the Essential book, and then go through the other topics as needed. Suggested approach to reading these is to review the table of contents and prioritize chapters by what you will get the most value out of. Each chapter can be finished on a short coffee break. For each chapter, read the introduction and review the Idea in Brief chart and then the Idea in Practice chart. Read the rest of the chapter for additional thoughts on essential thoughts the author has on the subject. If you are not very interested in a topic area, I would urge you to review the two charts for each chapter; this should take less than an hour. 

Michael Beer, Russel A. Eisenstat, and Bert Spector on change program that are not impactful
John P. Kotter on leading change
David A. Garvin and Michael A. Roberto on change through persuasion
Paul Hemp and Thomas A. Stewart leading change when business is good
W. Chan Kim and Renee Mauborgne on tipping point leadership
Debra E. Meyerson on radical change
Ronald A. Heifetz and Marty Linsky  provide a leadership survival guide
Robert Kegan and Lisa Laskow Lahey provide insights on why people won't change
Michael Beer and Nitin Norhia on cracking the code of change
Harold L. Sirkin, Perry Keenan, and Alan Jackson on challenges in change management