A number of scholars still emphasize the unique character of the Gospels: Robert A. Guelich, “The Gospel Genre,” in Das Evangelium und die Evangelien, ed. P. Stuhlmacher (Tubingen: J.C.B. Mohr [Paul Siebeck], 1983), pp. 183–219; Helmut Koester, Introduction to the New Testament (Philadelphia: Fortress Press, 1982), p. 169: “Thus, with his Gospel, Mark created a genre of literature.”