The Hodayot are a collection of poetic compositions of praise and thanksgiving that first became known with the discovery of the manuscripts in the caves of Qumran. These texts are preserved in eight copies, two found in cave l (1QHa, 1QHb) and six found in cave 4 (4QHa-e, 4QpapHf, 4Q427-432). This collection is reckoned, along with compositions such as the Rule of the Community, the War Scroll and the Pesharim, as one of the core sectarian documents of the specific type of Judaism reflected in the scrolls. The first part of this article describes the manuscripts, 1QHa, 1QHb, and 4QHa-f, with a specific focus on the distinctive features of each that contribute to our understanding of the nature and formation of the collection; the second part discusses specific topics that have been important in Hodayot research since the publication of the manuscripts from cave 4.