The Drei Magier ghost (Geiste) games are a family of games and toys originally published by Drei Magier Spiele and illustrated by Rolf Vogt, spawned, much like Chicken Cha Cha Cha and The Chicken Family of Zoch, by the Kinderspiel des Jahres-winning success of Geistertreppe.
Somewhat confusingly, Ghosts! was published by Drei Magier Spiele but not as part of the family: it was not illustrated by Vogt, its ghosts are not the wooden ones of Geistertreppe and neither does it follow the Geister_______ naming convention. Even more confusingly, Geistesblitz does feature a Geistertreppe-esque wooden ghost and almost follows the naming convention but is not a Drei Magier but a Zoch Verlag publication.