BTS will release a series of photo books one by one from Sept. 1. 　 The series will consist of eight books in total, seven dedicated to each of the septet and one for the whole group. Jungkook uploaded a teaser trailer for the project dubbed “Special 9 Photo-Folio” on Wednesday showing himself as a vampire. 　 Each of the 80-page books will be linked by their final photographs, which will hint at the next bandmate to be featured. 　 Meanwhile, the band’s anthology album &ldq