What does Jewish law have to say about smiling? What is so kosher about “kosher salt”? Is there a proper way to lend a cup of sugar? What does Judaism say about birth control?

99 Fascinating Facts You Didn’t Know About Jewish Life: The Jewish Life Hacker is an engaging and accessible introduction to some of the finer points of Jewish law.

The mini-essays included in this book, culled from the Jewish Treats archives, strive to make the intricacies of Jewish law familiar and understandable.