For those interested to begin a study of The Church of Jesus Christ of Latter-day Saints or knows someone who may be interested in such, the following would be some suggested resources:
Richard Lyman Bushman, Mormonism: A Very Short Introduction
Jana Riess and Christopher Kimball Bigelow, Mormonism For Dummies
Douglas J. Davies (Anglican), An Introduction to Mormonism
Stephen H. Webb (Catholic), Mormon Christianity: What Other Christians Can Learn from the Latter-day Saints
Of course, the official Websites of the Church would be good places, too: