So, I got home from the Nat'l Book Festival on Saturday. I had dusty toes and a tired back, but my head was swirling with gratitude for the way of the world. True, the lines inside the Barnes & Noble tent were obnoxiously long, but it was a great event in every other way. My friend Katharine and I set out by train - a pleasant two-hour ride – and spent our day strolling the grounds, eating Snicker bars in the sunshine, and generally marveling at the mass of people who came from all over the country to celebrate the best our country has to offer in terms of books and authors. I got to meet illustrator Rafael López and his lovely wife, Candice, who chatted with us about their mural projects, their new Obama poster, and our shared friends, whose talents we both admire. But in the afternoon, I received a gift I never expected from this festival. I'd managed to snag a chair inside the tent where Sandra Cisneros was speaking. I read The House on Mango Street in the 1980s, of course, and I've been a fan ever since, devouring her short stories, picture books and novels as soon as they're published. Her voice always rings fierce and true, and like so many other Latina authors, I can point to her work as an influence on why I like to capture Latino culture in fiction. She is, in my view, a literary madrina to our whole country.…