"One Hundred Days (Plus One)" by McNamara Margaret is a paperback book written in English. The book is titled "One Hundred Days (Plus One)" and is authored by McNamara Margaret. This book likely follows the story of a woman named Margaret as she reflects on her past 100 days and the extra day that she has added to her life. It may delve into themes of personal growth, self-discovery, and finding meaning in one's daily existence.