Down East’s blockbuster Making Whoopies: The Official Whoopie Book by Nancy Griffin tells you absolutely everything you need to know about this Maine delicacy — where it came from, where to get it, and even how to make a few of your own. But if you’ve fallen for the portable cakes, then you’ll need the perfect companion to Making Whoopies. Whoopie Pies (Chronicle Books, San Francisco, California; Hardcover; 120 pages; $16.95) is filled with two-dozen cake and two dozen filling recipes. The structure allows bakers to mix and match cake flavors from classic chocolate to jalapeño cornbread with filling flavors such as rosewater buttercream or lemon mascarpone. The book offers plenty of suggestions for good combinations: Whoopie Satay consists of a peanut butter whoopie filled with salty peanut butter filling, chocolate ganache filling, and a dusting of confectioner’s sugar spiked with curry powder.