【Two-Book Set: Mass Psychology and Advertising Techniques】 ■ Recommended for: ■ ・ Those who want to learn marketing ・ Those interested in psychology ・ Those working in the advertising and promotion industry ・ Those who want to improve their business skills ・ Those who want to utilize it for side businesses and sales ■ Product Details ■ This valuable two-book set allows you to understand human psychology and learn effective advertising and marketing techniques. It contains practical content and is packed with knowledge that can be immediately applied in business settings. ■ Condition ■ No noticeable scratches or stains. There is minor wear and tear from reading, but the text is clear and in good condition. There are no markings. ■ Environment ■ ・ No pets ・ Non-smoking environment ・ Stored in a clean environment ■ Other ■ ・ Immediate purchase is welcome ・ Purchases without comments are also OK ・ Feel free to ask any questions