Welcome to White Rabbit Japan!
Ready to step up your Japanese? The Nihongo Tadoku Books Complete Set contains all 8 Volumes of the popular series at a discounted price.
Motivate yourself by starting from Volume 1,which is around JLPT N5 level, and eventually, work your way up to Volume 6, where the stories and Kanji used is around N2 level.
Volume 7, and Volume 8 is a recently released version, which cover level 0-1, around JLPT N5 Level.