A book on implementing low temperature district energy solutions is coming. Answers are given to what to do on the building side, in the system and in the business case. The advantage of low tempered district heating systems is cost efficient use of renewable sources like solar, geothermal and waste heat. In combination with heat pumps, they can meet both heating and colling demands in new as well as in existing building stock. For further information on the book please view the IEA-DHC homepage, https://www.iea-dhc.org/home.