Official Japan Housekeeping Association Textbook for Certified Organizing and Storage Advisor Course Level 2 & Associate Level 1, Two-Book Set *Excellent condition, no writing inside After purchasing this material, why not take a course at the Japan Housekeeping Association? I personally recommend it because the instructors have published books and offer various courses, and the lectures are very enjoyable with their unique perspectives. You can use the certification for work or to help yourself and those around you, so I've put together this two-book set. Please understand that this is stored at home before purchasing. Thank you.