Mental Efficiency Series 5-Book Set 1916

Five small hardcover titles from Funk & Wagnalls’ Mental Efficiency Series (1916). Includes: Character: How to Strengthen It; Perseverance: How to Develop It; Poise: How to Attain It; Timidity: How to Overcome It; Common Sense: How to Exercise It. Beige paper dust jackets present with edgewear, chips and tears; spines rubbed and a few jacket losses at head/tails. Pages toned with foxing and an embossed owner stamp on front free endpapers. Bindings intact, text blocks clean and fully readable. Compact collectible set for vintage self-improvement collectors or display.