Cora C. Klein is an author about whom little public information is available; what can be confirmed is only her name and a single work, Practical Etiquette. Judging from the title, the book belongs to the category of practical guides to etiquette, likely covering everyday social courtesy, manners of speech and conduct, and how to behave in various situations, addressed to ordinary readers who wish to understand and follow accepted rules of propriety. Books of this kind are usually characterized by clear organization and easy reference, with plain language and an emphasis on practical application rather than theoretical discussion, and are therefore often used as handbooks for home or social occasions. Since only this one work is held in the collection and nothing can be verified about her life, nationality, or period of activity, only limited inferences can be made about her writing style and overall influence. Readers studying modern etiquette literature may treat the book as one sample of this kind of practical manual, but should not extend such descriptions to the author herself.