Originally designed as a "vacation book" for German students, the Lesevergnügen readers feature a group of students who meet in the summer and devise different games to play with their new found language. It's a review of the year, a refresher before going into the next, or a supplement to enhance the reading experience during the study experience. Reader/Activity books are available in levels one, two, three or four, which correspond to secondary schools years of instruction. All four levels are written entirely in German.