_The Mormons, or Latter-day Saints_, by Lieut. J. W. GUNNISON. (Published by Lippincott, Grambo, and Co.) The author of this little work has succeeded in the difficult task of doing justice to a new religious sect. Residing for several months in the Great Salt Lake Valley, as a member of the United States Exploring Expedition, and looking upon the singular condition of society that came under his notice with an eye of philosophical curiosity, he had a rare opportunity for studying the history, opinions, and customs of the remarkable people, whose rapid progress is among the note-worthy events of the age. His book contains a lucid description of the country inhabited by the Mormons, a statement of their religious faith and social principles, and a succinct narrative of the origin and development of the sect. Without aiming to excite prejudice against the Mormons, he keeps nothing back, which is essential to a correct view of their position, as respects either belief or practice. His disclosures in regard to the prevalence of polygamy among the "Latter-Day Saints," so called, are of the most explicit character, showing that a plurality of wives is adopted, as a part of their social economy, from a sense of religious duty. The view presented of their theology furnishes the materials for an interesting chapter on the history of mental delusions. We have no doubt that this book will be widely read, and, in the hands of the intelligent and reflecting thinker, will prove fruitful in valuable suggestions. Harper and Brothers have published a new edition of _Cicero's Tusculan Disputations_, with English Notes by CHARLES ANTHON, LL.D. In preparing this edition, use has been made of the text and notes of Tischer, with occasional reference to the commentaries of Wolf, Moser, and Kühner. Both in the text and notes, however, the erudite Editor has relied on his own judgment, not slavishly adhering to any authority, but freely consulting the suggestions of the most eminent philologists from the time of Bentley to our own days. The work is a model for a college text-book. In the careful supervision which it has received at the hands of Dr. Anthon, he has added to the many valuable services that identify his name with the progress of classical learning in this country. Derby and Miller have issued a new edition of SARGENT'S _Life of Henry Clay_, revised and brought down to the death of the illustrious statesman, by HORACE GREELY. The leading incidents in Mr. Clay's life are here described in a lively and flowing narrative; his public career is fully exhibited; copious extracts are given from his speeches and letters; and the whole biography is executed with manifest ability, and as great a degree of impartiality as could be demanded, with the decided personal predilections of both author and editor. The proceedings in Congress on the announcement of Mr. Clay's decease, which are given at length, form a very interesting portion of the volume.