Peter served as an editor of a special issue in JCP called “The Ever-Expanding Optics of Single-Molecules and Nanoparticles”. The issue highlights recent advances in single-molecule optics that stemmed from the pioneering work of, amongst others, Prof. Michel Orrit (who will formally retire in 2022). Other guest editors are Haw Yang, Frank Cichos, and Ted Xia. Read the article collection here.