This volume stands alongside its author's recent catalogue of the Merton College collection as an important addition to scholarship on Oxford's Western medieval manuscripts. Before its publication, scholars had to refer to Henry Coxe's mid nineteenth-century catalogue of Oxford college holdings for information about Corpus's remarkable collection. Rod Thomson surveys the manuscripts with erudition and curiosity. All of the categories of information that users are likely to want are addressed: codicological, textual, palaeographical, punctuative, art historical, bibliographical etc. The volume is prefaced by a concise introduction to the history of medieval book-acquisition at Corpus and a note on former catalogues of the collection. The indexes are very full, and there is a splendid section of over 100 plates, twenty-five in colour, illustrating specimens of interest and the most important examples of illumination. As with his other catalogues, Thomson brings to light numerous important discoveries and demonstrates the research potential of aspects of a previously understudied collection. For example, he is able to make substantial additions to Neil Ker's list of books from the Augustinian abbey of Llanthony Secunda (see p. xxvi n. 62). He presents a volume assembled and partly written by the famous musician John Dunstable. He reveals the interest of the bindings that house a number of the manuscripts. Perhaps most important, Thomson carefully describes the large collection of fragments taken from the bindings of printed books owned by the college. This section (pp. 159–83) contains much new information and significantly enhances the catalogue's general importance. Overall, the only significant query that occurred to this reviewer in reading the catalogue was whether a book (ms 58, an early thirteenth-century copy of Statius’ Thebais) with the ex libris ‘Iste liber est conuentus Iernemute’ should be attributed to the Benedictine abbey of Wearmouth, as Thomson says, or the Benedictine priory of St Nicholas at Great Yarmouth. The latter is more likely: in any case, this is a previously unrecorded provenance.