These four volumes constitute the cheapest and best edition of the Essays of Prentice Mulford published in the English language. =SCIENCE AND THE INFINITE, or Through a Window in the Blank Wall.= By SYDNEY T. KLEIN. Crown 8vo, 183 pp., cloth, 4s. 6d. net. “This book is of an importance which I think it would be hard to overrate. The two main religious tendencies of to-day are towards Science and Mysticism. Mr Klein unites the two.”--_English Review._ =MASTER KEYS OF LIFE AND DEATH.= By Captain CAREY, R.N. Crown 8vo, 3s. 6d. net. “Master Keys” explains in simple English the occult teachings of Theosophy and Spiritualism concerning Life and Death. WILLIAM RIDER & SON, LIMITED 8 PATERNOSTER ROW, LONDON, E.C. 4 TRANSCRIBER’S NOTE Page 2: “same event, whoever,” changed to “same event, however,”.