We would like to inform our Readers that the issues 1 and 2 of 2019 (vol. 48), constituting a double special issue, are by now already available through EBSCO and GALE. This double special issue contains a series of papers by world leading specialists in optimal control theory and optimisation on their most recent results, and is dedicated to Professor Guenter Leugering on the occasion of His 65th birthday. The two issues are guest edited by the team of Michael Hintermueller, Michael Hinze, Jan Sokołowski and Stefan Ulbrich.

The issues 3 and 4 of 2019, both regular issues, shall be appearing very soon.