ナイトメア (Nightmare) is releasing a two volume book set that is currently entitled Nightmare History Artist Book (title subject to change). One volume is a history of the band which will allow you to look back on the eight year history of the band as well as follow the members from childhood until now, loaded with tons of interviews (in japanese of course). The second volume is a photobook which will feature new pictures, as well as pictures from past lives, promotional video recordings and more. The books are A4 size and come with a case.
You can pre-order now on CDJapan