Complex sentence: It is the first of three Nero Wolfe books that involve crime syndicate leader Arnold Zeck and his widespread operations; the others are "The Second Confession" and "In The Best Families".
Split into simpler sentences: It is the first of three Nero Wolfe books that involve crime syndicate leader Arnold Zeck and his widespread operations. The others in the Zeck Trilogy are "The Second Confession" and "In the Best Families".