Helene Seltzer Krauthamer 
The Great Pronoun Shift [PDF ebook] 
The Big Impact of Little Parts of Speech

This book is a holistic exploration of personal pronouns in English and their development. In conversational prose and drawing on linguistic and psychological research, Helene Seltzer Krauthamer gives an overview of what pronouns are, why they are problematic, what they reveal about us, how they can be used effectively, where they came from, and where they are going. Assuming no specialized knowledge and with helpful real-world exercises at the end of each chapter, the book aids growth and inspires thought in students and other readers, spelling out the implications of these changes for teachers, writers, and all who write or speak in English.