In some places, bar and bat mitzvahs are rivaled only by proms as the most important social event in many teens' lives. Parties celebrating the occasion can range from humble cookies-and-punch receptions to lavish catered affairs with elaborate themes and celebrity guests. But more important, bar mitzvahs and bat mitzvahs are serious religious ceremonies, with rich histories and deep significance to the participants.

Here is a warmly written discussion of these important Jewish coming-of-age rituals, their historical backgrounds and evolution. A special chapter...