The narrative pacing in this book is interesting - the entire novel (over 300 pages) cover just 26 hours in the life of one man, Henry Perowne. For most of the book, it's not about action, it's about what might happen / have happened. For a more in-depth discussion, see my blog post here: outsideofacat.wordpress.com/2021/12/02/saturday-ian-mcewan/