Just keep in mind that crafters aren't historians. It's fine to use most of them as a jumping off point, I suppose, but there are craft books out there promoting myths and wives tales as fact. If you enjoy history, try a personal research project using reliable source materials. You might get hooked on yet another hobby.
Nothing against Kathleen (as I'm referring to the genre and not her). I like her blog a lot. Haven't seen any of her books in person but they seem charming. I'm sure I would enjoy reading them while teaching a child to sew. I successfully used the Little House Cookbook on a kid a few years back. She still makes one of the recipes.