The Odes (Latin: Carmina) are a collection of lyric poems by the Roman poet Quintus Horatius Flaccus (known in English as Horace). Modelled on the Greek odes of Sappho and Alcaeus, they address a range of public and private subjects, and reflect the reconciliation of Horace, a republican soldier during the Civil War, with the regime of Augustus.
The first three books, published in 23 BCE, are dedicated to the emperor's literary adviser, Maecenas, who was introduced to Horace by Virgil. A fourth volume was added a decade later.
The Odes at online book stores
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Free online texts
Internet Archive: Odes and Epodes, translated by C.E Bennett. Loeb edition. EPUB, MOBI, PDF and TXT formats.
Gutenberg: The Odes and Carmen Saeculare. EPUB, HTML, MOBI and TXT formats.
Perseus: Odes, translated by John Conington. HTML and XML formats.
Poetry in Translation: The Odes, translated by A.S. Kline (2003). Multiple formats.
University of Adelaide (Internet Archive): The Works of Horace, translated into English Prose by C. Smart. EPUB, MOBI and HTML formats.
Wikisource: Odes, translated by Wikisource (incomplete). HTML and other formats.
Wikisource: The Odes and Carmen Saeculare, translated by John Conington (incomplete). HTML and other formats.
Gutenberg: Odes and Epodes, edited by Gordon Jennings Laing and Paul Shorey. EPUB, HTML, MOBI and TXT formats.
Perseus: Carmina, HTML and XML formats.
Wikisource: Carmina. HTML and other formats.
Librivox: The Odes and Carmen Saeculare, translated by John Conington. Free public domain audiobook.
Literature and History: Episode 50 - Our Brutal Age. Episode 51 - Horace and Augustan Poetry. Podcast and transcript by Doug Metzger.
Perseus: Commentary on Horace, Odes, Epodes, and Carmen Saeculare, by Paul Shorey, 1910.
Wikipedia: Horace - Odes (Horace)
Further reading at Tom's Learning Notes
Quintilian: Institutes of Oratory.
Wilfrid Owen: Dulce et decorum est.
Bloom's Western Canon: The Odes are listed.
Latin resources: Learn to read Latin texts in the original.