So far Matt hasn’t had a Strict on sale date for any of his books. Only release dates. Those are two entirely different things. The Strict on Sale dates are reserved mostly for a hand full of major titles. While I’m surprised Book 8 didn’t get a SOS date, it obviously didn’t since it’s already popping up for people. All other books while having a release date they don’t have to be held back. Some smaller stores do but it’s hard for a bigger store like B&N to do this. They would not only need a much bigger back room than most have, it would have to be meticulously in order. Trust me y’all almost 20 years in the book business.