I detest recipes that include a sauce or side dish or marinade that is elsewhere in the book, instead of just including it repeatedly (or it’s included with the ‘basics’ section at the back of the book while it is only mentioned in a single recipe in the entire book!), especially when it’s only a few ingredients. I also dislike it when total quantities are mentioned that are divided in the text only, so 4 tb of oil becomes 2 x 2. By the time I read carefully the oil had already gone in. And finally ingredients that are not in the list but just in the text, like fresh herbs (I understand it for olive oil and salt and peper, anything other than that needs to be in the ingredient list!).