So I've got the Essential Moon Knight, and I'm reading a crossover story with Spidey where Moony makes a reference to his "stint with the Defenders." There's a footnote saying "see Defenders 47-51." So I'm thinking--why aren't those issues in this book? Aren't the Essential series supposed to collect all of the earliest appearances (at least initially)? Any one else notice any "gaps" in other titles?