Publisher: Kehot Publication Society
By: Rabbi Shneur Zalman of Liadi, the Alter Rebbe
Format: 7" x 9" hardcover 841 pages
Also known as Siddur with Dach. The text of prayer according to the form of the Arizal, as arranged by the Alter Rebbe, with the laws of prayer and the rulings of the Alter Rebbe, and his discourses (known as Dach, meaning Divrei Elokim Chaim, covering every aspect of life.
The Previous Rebbe, Rabbi Yosef Yitzchak said that to understand what is the service of the brain one must learn the Siddur with Dach.
A historical introduction: The Arizal did not actually edit his Siddur (Prayer Book). The commentaries of his disciples and their records of the number of words in each prayer and various other details, made it possible to reconstruct, more or less, the exact form of the Arizals order of Tefillah. This was the basis for Siddurim printed in his name, but until the era of Chasidus there was no authoritative version.
The Alter Rebbe set himself the task of examining this mass of tradition. According to the Rebbe the Tzemach Tzedek (in Bais Rebbe), the Alter Rebbe had before him sixty Siddurim, from which he selected the most exact version of each prayer. The Alter Rebbes special purpose was to bring the Siddur into conformity with the Rishonim, the pre-modern scholars whose words are sacred and authoritative, and to secure an exact text. According to his brother the MaHaRil (author of Sheris Yehudah), he was especially concerned that young people begin to pray with the correct version, without falling into erroneous habits.
More than one hundred editions have appeared, in all the reaches of the earth. Tradition holds that the first edition was in 5563 (1803). The current arrangement, with discourses, was submitted to the press by the Mitteler Rebbe in 5576 (1816).
Many editions of the prayer-book itself have appeared, including the Kehot Publications Siddur Tehillat Hashem.
New to this edition are a section of annotated source notes and emendations to the text based on close readings of the original manuscripts.