Six essays by author Richard E. Sullivan. "Church historians, medieval historians, and all medieval scholars, especially those of the early Middle Ages, take note: this is a volume of well-written, expertly documented, and perceptive scholarship, well worth a close read from cover to cover"--from the review.
Greeley, June-Ann. "Christian Missionary Activity In The Early Middle Ages." Catholic Historical Review 81.3 (1995): 419-421.