"Ongoingness: The End of a Diary" is a reflective work by author Siri Hustvedt that explores the nature of memory, time, and the act of writing. The book delves into the author's personal experiences, particularly focusing on her relationship with her late father and the impact of his death on her life and writing. In this narrative, Hustvedt examines the concept of ongoingness, suggesting that life continues in various forms even after significant events. She intertwines her thoughts on the diary as a medium, emphasizing how it captures fleeting moments while also acknowledging the permanence of loss and the fluidity of memory.