The somewhat neglected Wisdom of Solomon, or ‘Book of Wisdom’, contains concepts important not only for understanding wisdom in the rest of the OT but also for understanding how wisdom bridged both testaments. Joachim Schaper gives priority to the book’s theology and its place in Hellenistic Jewish and early Christian thought. He provides an overview of the book’s structure and versions, its intellectual context, its universalistic conceptions of God and humans in history, and how the book exhibits a ‘spiritual exercise’. Most important here are Wisdom’s use of πνευμα (‘spirit’) and its amalgam of Platonic, Stoic and Egyptian elements. It offers a distinct interpretation of the exodus, with which Schaper accounts for ideas of liberation and eschatology. As for the book as spiritual exercise, the discussion turns to matters of genre and literary function, disclosing its purpose to fortify religious beliefs and one’s self-mastery.