author
Best known for early 20th-century self-help books on composure and character, this elusive author wrote in a direct, practical style aimed at everyday self-mastery. Their work in the Mental Efficiency Series promised that calmness, confidence, and discipline could be learned.

by D. Starke
D. Starke is a little-documented author associated with the Mental Efficiency Series, a group of early self-improvement books published in the 1910s. Reliable source material found during this search clearly links the name to Poise: How to Attain It and Character, How to Strengthen It, with Poise appearing in an authorized English edition translated by Francis Medhurst and published in 1916.
The surviving record says much more about the books than about the person. In Poise: How to Attain It, Starke presents self-command as something that can be developed through reflection, habit, and practical exercises. That focus on training the mind and temperament places the work firmly in the popular self-help tradition of the early 20th century.
Because biographical details about D. Starke are scarce in the sources available here, it is safest to treat the author as a somewhat obscure figure whose legacy rests mainly on these concise guides to personal development. Even so, the books have remained in circulation through reprints and digital archives, suggesting a lasting niche appeal for readers interested in classic advice on confidence, balance, and self-discipline.