Little, Brown and Company
Available: hardcover, paperback, Kindle
THE NAME OF THS BOOK IS SECRET is the first book in the Secret series.
The most important character in this book is the narrator, who literally takes over from page one. The actual mystery doesn't get going until about page 15 after the narrator assumes the reader has accepted his deal to, "forget everything you read as soon as you read it." At this point the story begins, but of course the names and places have been changed to protect the innocent in Your Hometown. The story finally begins about two kids, "Cass and Max-Ernest" who discover a secret society operating in their [your] hometown whose goal is to achieve immortality at any cost. Of course, this puts the kids in all sorts of exciting situations as they try to thwart the society.
Although the narrator might be annoying to adults, most kids will be delighted with his attitude, off the wall comments, and irreverent observations. They won't mind that he delays getting on with the mystery.