Book excerpt: How to Read a Diary is an expansive and accessible guidebook that introduces readers to the past, present, and future of diary writing. Grounded in examples from around the globe and from across history, this book explores the provocative questions diaries pose to readers: Are they private? Are they truthful? Why do some diarists employ codes? Do more women than men write diaries? How has the format changed in the digital age? In answering questions like these, How to Read a Diary offers a new critical vocabulary for interpreting diaries. Readers learn how to analyze diary manuscripts, identify the conventions of diary writing, examine the impact of technology on the genre, and appreciate the myriad personal and political motives that drive diary writing. Henderson also presents the diary’s extensive influence upon literary history, ranging from masterpieces of world literature to young adult novels, graphic novels, and comics. How to Read a Diary invites readers to discover the rich and compelling stories that individuals tell about themselves within the pages of their diaries.