The Carmen Saeculare was composed and published in 17 BCE as Horace was returning to the genre of lyric which he had abandoned six years earlier; the fourth book of Odes is in part a response to this poem, the only commissioned poem we know from the period. The hardening of the political situation, with the Republic a thing of the past and the Augustan succession in the air, threw the problematic issue of praise into fresh relief, and at the same time provided an impulse towards the nostalgia represented by the poet's private world. Professor Thomas provides an introduction and commentary (the first full commentary in English since the nineteenth century) to each of the poems, exploring their status as separate lyric artefacts and their place in the larger web of the book. The edition is intended primarily for upper-level undergraduates and graduate students, but is also important for scholars.