kri'ot kodesh (קרי×ות קודש)
sacred readings = "psukim kdushim" (פסוקים קדושים) or "psukei kodesh" (פסוקי קודש)
The most sacred part is the Torah, which is the first 5 books of the Hebrew Bible.
Hebrew
The Tanakh (Hebrew Bible) has information about the Hebrew leaders. See also:http://judaism.answers.com/jewish-history/timeline-of-jewish-history
Judaism
Torah
Hebrew!
Jews and Christians.
Because it's from God.
The Torah (תורה)
both
The holy language for Jews is Hebrew.