In her interview, Penny explains why she prefers the internet to cookbooks:

I don’t believe in cookbooks because I want recipes for the foods I have, as opposed to buying ingredients for recipes. Unlike cookbooks, the internet allows me the flexibility to find recipes based on a list of ingredients.

Penny makes a good point. When you start with a recipe, you’re stuck with a list of ingredients. But you can search for new recipes by plugging your ingredients into a search engine.

I personally wouldn’t give up my cookbooks.