Dianetics Today is a book compiled from the work of L. Ron Hubbard and published in 1975 (Bridge Publications, Inc., ISBN 0-88404-036-4). It was created to mark the 25th anniversary of Hubbard's practice of Dianetics, which had been introduced in his 1950 book Dianetics: The Modern Science of Mental Health. The book discusses and updates Dianetics in the light of technical developments allegedly made by Hubbard in the previous quarter of a century.