Jason König is Professor of Greek at the University of St Andrews. This is the third in a trilogy of volumes arising from a Leverhulme-funded research project, 'Science and Empire in the Roman World', which ran from 2007 to 2010 in St Andrews; the other two volumes, Ancient Libraries and Encyclopaedism from Antiquity to the Renaissance, were both published by Cambridge University Press in 2013. Greg Woolf is Professor of Classics and Director of the Institute of Classical Studies in London. He co-directed the project 'Science and Empire in the Roman World' at St Andrews and co-edited the two previous books resulting from it.

• 1. Introduction: self-assertion and its alternatives in ancient scientific and technical writing Jason König; 2. Philosophical authority in the Imperial period Michael Trapp; 3. Philosophical authority in the Younger Seneca Harry Hine; 4. Iurisperiti: 'men skilled in law' Jill Harries; 5. Making and defending claims to authority in Vitruvius' De architectura Daniel Harris-McCoy; 6. Fragile expertise and the authority of the past: the 'Roman art of war' Marco Formisano; 7. Conflicting models of authority and expertise in Frontinus' Strategemata Alice König; 8. The authority of writing in Varro's De re rustica Aude Doody; 9. The limits of enquiry in Imperial Greek didactic poetry Emily Kneebone; 10. Expertise, 'character', and the 'authority effect' in the Early Roman History of Dionysius of Halicarnassus Nicolas Wiater; 11. The authority of Galen's witnesses Daryn Lehoux; 12. Anatomy and aporia in Galen's On the Construction of Fetuses Ralph M. Rosen; 13. Varro the Roman Cynic: the destruction of religious authority in the Antiquitates Rerum Divinarum Leah Kronenberg; 14. Signs, seers and senators: divinatory expertise in Cicero and Nigidius Figulus Katharina Volk; 15. The public face of expertise: utility, zeal, and collaboration in Ptolemy's Syntaxis Johannes Wietzke; 16. The authority of mathematical expertise and the question of ancient writing more geometrico Reviel Netz; 17. Authority and expertise: some cross-cultural comparisons G. E. R. Lloyd.

'… anyone interested in the study of scientific/technical literature will certainly find something useful in one or another of the seventeen individual papers. … the copyediting is excellent and the volume is easy to use: it has copious notes and bibliography (860 titles); the original texts are often given in addition to the English translation; and there is a helpful index.' Emilie-Jade Poliquin, Bryn Mawr Classical Review