from Reddit--most of these are business or management oriented, though the Brown one looks OK and the Cook one is relevant to teachers
Crucial Conversations by Kerry Patterson
Humble Inquiry by Ed Schein
A More Beautiful Question by Warren Berger
Question behind Question by John Miller
Smart Questions
Asking The Right Questions: A Guide to Critical Thinking by Neil Brown
Ask Powerful Questions by Will Wise
Group Glue: The Connective Power of How Simple Questions Can Lead to Great Conversations by Jeffrey T. Cook
Coaching Questions by Tony Stoltzfus