The novel has 14 chapters each told by a different character. The characters are all related in some way to each other. The underlying plot premise is that some of the characters were involved in the creation of a product that lets you externalize and capture all of your memories. Some people choose to let their memories become part of a globally accessible database of memories, so that a subscriber can, for example, review an event in their life from the point of view of the memories of all the participants - living and dead. Some, initially eccentrics, choose to exclude themselves from the system. The analogy to the internet and social media is obvious. The different character’s stories explore various aspects of the author’s imagined consequences of such a monstrosity. It seemed to me that these explorations were overall a little superficial and that most of the novel concerns interpersonal relationships that were independent of the main plot premise. I didn't do it, but you might want to write down the relationships among these characters as you go, so when you get to the middle of the book you don't find yourself asking, "She is the friend of whose next door neighbor?" As in her previous A Visit from the Goon Squad, Ms. Egan has tried to achieve a sense of non-linear time by using both different narrators and different writing techniques, e.g. a series of e-mails or text messages, in each chapter. The novel bored me at times, perhaps because I’ve read A Visit from the Goon Squad and I’m so easily jaded. My favorite chapter is the last one about the memories of a little boy’s experience playing baseball. It makes a few different points in a subtle and moving way, and I think it shows what the rest of the novel could have been, but isn’t quite.