Bob Cook and the German Spy (Paperback)

Bob pushed the electric bell, and almost instantly the front door was opened by Frank Wernberg. It would seem as if he had been behind the door waiting all the time. His close-cropped light hair bristled fiercely, and his nose was still slightly swollen; his chin also was still raw where Bob had planted his fist the day before. Bob thought how much longer ago than that it seemed; so many things had happened in the last two days.