Stierle on Non-Practiced Patents

Martin Stierle has published a book titled Das nicht-praktizierte Patent ("The non-practiced patent") (Mohr Siebeck 2018), based on his Ph.D. thesis (for which I understand he was awarded the Faculty Prize of the Law Faculty at Ludwig Maximilian University in Munich).  Here is a link to the book's Amazon webpage, and here is the book description (my translation from the German):

Patent trolls have become an essential part of patent law discussions over the past decade.  Inspired by developments in the U.S., the prevailing scholarly opinion in Germany is critical of the availability of injunctive relief for non-practicing entities, while the German case law on the subject nevertheless continues to afford claims for injunctive relief even to NPEs.  Martin Stierle undertakes a change in perspective.  He frees himself from the perspective of the patent owner and considers the problem from the standpoint of protective rights.  In the center stands the non-practiced in all its facets (blocking patents, licensing patents, sleeping patents, etc.).  With the use of patent function theory, he proposes the adoption of a legal obligation to practice one's patent, which would apply regardless of the type of patent holder.  He underpins his theory with legal history, comparative law, and law & economics considerations.

I haven't started reading it yet, but my library has obtained a copy.