The Jewish Book of Why

Why are there kosher dietary laws, why must the chapter of curses in the Tora be read quickly in a low voice, and what's the point of visiting a body of water to empty pockets of crumbs on Rosh Hashana? Kolatch writes lucidly and knowingly, explaining the biblical, traditional and superstitious sources of thousands of questions pertaining to Judaism; the comprehensive index is expertly organized.