Siddur atop Tehillim

Hi,

One who has a siddur [prayer book] that contains Tehillim [Psalms], and a book that consists solely of Tehillim, should place the siddur on top of the Tehillim. This is because the siddur contains passages from the Torah, as well as the Tehillim, and so it is of greater sanctity. However, reversing the order is not terribly wrong.

(Rivivot Ephraim 1:119:2)

המצפה לישועה,
Mordechai

Putting a tallit on top of a siddur or other sacred book

Hi,

One may not put a tallit on top of a sacred book, like a siddur; its own sanctity is of a lesser degree. However, one may do this for the protection of the siddur, or for its honour. Therefore, one may wrap a Torah scroll with a tallit to preserve its honour or safety.

(Rivivot Ephraim 1:119:1)

המצפה לישועה,
Mordechai

Siddurim printed on Shabbat

Hi,

One may not daven from siddurim that were printed on Shabbat, and one may not learn with texts that were printed on Shabbat.

(Rav Moshe Feinstein, Igrot Moshe Orach Chaim 2:17)

המצפה לישועה,
Mordechai