I. Howard Marshall (1934-2015; PhD, University of Aberdeen) was emeritus professor of New Testament exegesis and honorary research professor at the University of Aberdeen. He authored or edited numerous books, including Concordance to the Greek New Testament (6th edition), The Gospel of Luke (NIGTC), The Epistles of John (NICNT), A Critical and Exegetical Commentary on the Pastoral Epistles (ICC), and Acts (TNTC).