This is a set of two books that teach the basics of thinking and logic. * Shigehiko Toyama, "The Art of Thinking Clearly" (Chikuma Bunko) * Condillac, "Logic: The First Steps in the Art of Thinking" (Kodansha Gakujutsu Bunko) Recommended for those who want to improve their "way of thinking" for reports, writing, planning, and studying. Condition: [Writing/Underlining → None] [Yellowing → None] [Cover → Included] Waterproof packaging + simple packaging, shipped via anonymous delivery. * I'm not currently considering selling them separately (please comment if you're interested).