In this episode, Marta invites Willem to discuss his new book (co-edited with Roberto Caranta) on mandatory sustainability Requirements in EU Public Procurement Law. (out in October at Hart) Why is this topic in which the EU seems to move from regulating 'how to buy' towards 'what to buy' in need of discussion? What academic questions are relevant to ask for all those involved in sustainable public procurement? How will this affect procurement practices in the EU and what can be improved in the future? For dessert, they discuss academic summers. How to unwind in light of the need to finish stuff as well?