The Book of Ruth is included in the third division, or the Writings (Ketuvim), of the Hebrew Bible. In most Christian canons it is treated as one of the historical books and placed between Judges and 1 Samuel.
Hebrew text of Ruth
Naomi entreating Ruth and Orpah to return to the land of Moab by William Blake, 1795
Julius Schnorr von Carolsfeld: Ruth in Boaz's Field, 1828
The Five Scrolls or the Five Megillot are parts of the Ketuvim ("Writings"), the third major section of the Tanakh. The Five Scrolls are the Song of Songs, the Book of Ruth, the Book of Lamentations, Ecclesiastes and the Book of Esther. These five relatively short biblical books are grouped together in Jewish tradition.
The five megillot in multilingual micrography (Latin and Hebrew) by Aaron Wolf Herlingen, 1748
A cabinet containing the five megillot in order from right to left. (Esther is in the wooden case on the left.)