The traditional Jewish Tanakh contains 24 books.
Tanakh is an acronym formed from Torah, Nevi'im, and Ketuvim—the Torah, the Prophets, and the Writings. Its 24-book count reflects the Jewish arrangement and naming of the biblical texts, rather than the 39-book count commonly used for the Old Testament in many Protestant Christian Bibles.
Several works counted separately in some Christian traditions are combined in the Tanakh. For example, the Twelve Minor Prophets are treated as one book, and Samuel, Kings, Chronicles, and Ezra–Nehemiah are each counted as single books. The Jewish ordering also differs from most Christian arrangements, with Chronicles traditionally appearing at the end.
The Tanakh is not the same as the Talmud. The Tanakh is Judaism’s foundational collection of biblical books, while the Talmud records rabbinic discussions and interpretations of Jewish law and tradition.