A. E. Housman's five-volume critical edition of Marcus Manilius's Astronomicon has long been regarded as the definitive work on the subject. The task of bringing the edition together was one of considerable proportion which took Housman twenty-seven years to complete. It is now considered one of his most enduring and important contributions to scholarship. This volume contains the Latin text of the fifth and final book of Manilius, first published in 1930, and then reissued in a second edition by the Cambridge University Press in 1937. A short note by A. S. F. Gow regarding the alterations is included, as is an index covering all five volumes of the work. Housman provides his customary Latin commentary and English preface along with a retrospective survey of the five books and their manuscript sources.