The Hafetz Hayyim on the Siddur is not the only English-language book to explore the deeper meaning and functionality of Jewish prayer, but it was the first to delve into the subject from the viewpoint of one of the holiest and most learned rabbis of modern times, the Chafetz Chaim (Rabbi Israel Meir HaKohen Kagan). It is the product of considerable team effort: the text was gathered and arranged by Rabbi David Zaretsky, then translated from the Hebrew by Charles Wengrov and edited by Rabbi Isaiah Aryeh and Joshua Dvorkas.
This work comprises a collection of thoughts, reflections and interpretations of Jewish prayers. Its highly detailed contents list reveal that the text embraces not merely daily prayers but also the period of compassion and penitence surrounding and including Rosh Hashanah and Yom Kippur, as well as the festive period that follows them.
You can find this book, which is part of the Marvin N.
Hirschhorn collection, on the shelves of Beit Knesset Hanassi.