Koguma-kai Hitori de Tokkun Set of 7 books 21 Observation from Four Directions 1 92 Observation from Four Directions 2 42 Rotational Reasoning 44 Movement on a Map 43 Balance 14 Understanding Stories 1 15 Understanding Stories 2 The right edge of "Balance" is slightly creased. There are crayon scribbles on the back cover of the question book for "Understanding Stories 1". Some items were purchased used. ◯ I scanned everything and printed them out, having my child study repeatedly. ◯ There are probably no pen markings, but please forgive me if I missed any. These are being offered at a low price due to being used. Thank you for your understanding.