I saw a photo online of a pumpkin sourdough bread and I could more or less envisage how the recipe would go but checked this book just to be sure. Sure enough, the book had a recipe similar to what I was thinking, suggested it could be made with parsnips instead of pumpkins (which I might try sometime, not something I would have even thought of), and suggested adding nutmeg (which is perhaps slightly more obvious, but a nice prompt). And that's just one of 240 recipes.