Q. If there is a torn page in a sidur and I can’t read the page, can I just join the two parts together during Shabbat davening without attaching them in any way?

A. Poskim are lenient when one has not another proper sefer available (Teshuvos Rema 119, Mishne Halochos 6: 89, Shmiras Shabbos K’ 28: 3)