 It was decided, that Apollo Books would continue and conclude the series with volume 5 on Tortricidae, volume 6 on Pyralidae and Pterophoridae, and volume 8 on Geometridae.At the same time they took over the remaining stock of the previous seven volumes of the series.From 1 January 2013, Apollo Books announced that all Harley Books titles and the majority of the Apollo Books titles, have been taken over by the Dutch publisher Brill Publishers.