Do you want to learn how to start using Decision Management and DMN in practice?
You may want to check a roundup post where 18 DMN experts share practical tips. I have also asked them for recommendations for people starting with DMN and on a basis of this input prepared for you a list of DMN resources.
Did I miss something useful? Let me know in comments!
The Decision Model: A Business Logic Framework Linking Business and Technology by Barbara von Halle and Larry Goldberg
[Upcoming] Real-World Decision Modeling with DMN by James Taylor and Jan Purchase
Courses, presentations, tools