It’s the most delicious time of the year. The holiday baking season has begun, and for extra inspiration, we’ve rounded up a collection of Christmas-ready cookies from this fall’s fresh batch of baking cookbooks. First, we stop in Germany, where the Advent season is marked by a steady parade of traditional treats. For Anja Dunk, the half-Welsh, half-German author of “Advent: Festive German Bakes to Celebrate the Coming of Christmas,” vanillekipferl, light and crumbly crescent cookies with a generous coating of powdered sugar, are one of the most defining sweets of the season. RECIPE: Vanillekipferl (Vanilla Crescents) From Minnesota, Sarah Kieffer shares another sugar-dusted Christmas classic—albeit a more modern one—in “Baking for the Holidays.” Her red velvet crinkle cookies, tinted deep burgundy, peek through cracks in a snowy coat. RECIPE: Red Velvet Crinkle Cookies For bigger chocolate fiends, baking guru Dorie Greenspan, who’s just released her 14th book, “Baking With Dorie,” has …