Complex sentence: Morris's book, "The Genesis Flood", coauthored by John C. Whitcomb, was very influential on modern creationist belief, and by the time of Morris's death, it was in its 44th printing and sold 250,000 English copies.
Split into simpler sentences: Morris's book, "The Genesis Flood", coauthored by John C. Whitcomb, was very influential on modern creationist belief. By the time of Morris's death, "The Genesis Flood" was in its 44th printing and sold 250,000 English copies.