A selection of letters culled from a contest sponsored annually by Weekly Reader's Read magazine. For the purposes of the contest, readers in grades 6-10 were invited to "tell" an author, living or dead, how their book affected their lives. The 75 letters here have been divided into five broad categories: overcoming difficulties, the power of conviction, self-discovery, war, and lifelong inspiration. The distinctions between some of these categories, however, are not completely clear. Each letter is preceded by a brief introduction to the author. The letters vary as to how much they reveal about the letter-writers and the authors. A wide spectrum of writers, from Judy Blume to Upton Sinclair, is included. While some of the entries refer to single books by a relatively unknown or obscure writer, in most cases the choices are likely to be familiar to most students. The hyperbole of the subtitle is unfortunate, since while most of the letters reflect the writer's sentiments and intense feelings about the book, only a few declare or even intimate that it "changed their lives." Nevertheless, the letters themselves are well written, thought-provoking, and likely to stimulate curiosity about the titles mentioned. Teachers could use this collection to help motivate their students or to use as examples of letter-writing. Whether or not children are likely to pick it up on their own is another question.