The concept of Pi, the ratio of a circle's diameter and circumference, has a secret Jewish history intertwined with mathematical and spiritual dimensions.

Gematria Refigured by Rabbi Elie Feder is a book that explores the method of gematria, which assigns numerical values to Hebrew words, to understand how the Torah conveys ideas through numbers.

"Quarried in Air" delves into the enigmatic and influential Jewish text Sefer Yeirah, also known as The Book of Creation, which explores the relationship between language, numbers, and the creation of the universe.