After four straight weeks of declining year-over-year book sales, the final full holiday week of sales, for the week ending December 21, was very strong, according to Circana Bookscan. Sales of 33.34 million units were up 4.6 percent over the comparable week from 2023, when consumers bought 31.88 million units — making it the best holiday week of print sales recorded by Bookscan over the past five years. That late surge in book sales also suggests that the final sales week of the year, which will include two more days of holiday sales, could be strong on a comparison basis …