Special issue:“Climate change – federal responses to a global challenge” 2024, 1. edition, 441 pages, 99 Euro, ISBN: 978-3-7560-1786-7 (Print); 978-3-7489-4461-4 (E-Book)
Special issue I: "The Conference on the Future of Europe –national and regional participation" Special issue II: "70 Years of Baden-Württemberg" 2022, 1. edition, 516 pages, 104 Euro, ISBN: 978-3-7560-0422-5 (Print); 978-3-7489-3673-2 (E-Book)
Special issue: "Management of the Corona pandemic in federal and quasi-federal states" 2021, 1. edition, 506 pages, 98 Euro, ISBN:978-3-8487-8388-5 (Print); 978-3-7489-2778-5 (E-Book)
Special issue: "Constitutional courts and their effect on federal units" 2020, 1. edition, 443 pages, 98 Euro, ISBN: 978-3-8487-7020-5 (Print); 978-3-7489-0117-4 (E-Book)
Special issue: "70 Years of Federalism in the Federal Republic of Germany" 2019, 1. edition, 455 pages , 98 Euro, ISBN: 978-3-8487-6007-7 (Print) // 978-3-7489-0117-4 (E-Book)
Special issue: "Internal Security as a 'Joint Task' for the Federation, the Länder and the European Union" 2018, 1. edition, 465 Seiten, 98 Euro, ISBN 978-3-8487-5534-9 (Print) // 978-3-8452-9657-9 (E-Book)
Special issue: "Reform of fiscal relations in the German federal state and its effect on German federalism" 2017, 1. edition, 582 pages, 124 Euro, ISBN 78-3-8487-4574-6 (Print); 978-3-8452-8825-3 (E-Book)