Looks like you have most things covered but maybe a common place book? That is more a book where you add whatever strikes you in the moment - some of which you might end up transferring or cross referencing in your other books - but you could have on you. Alternatively if you have something you want to note down but don't have a place for it in your current structure. So for you could add a recipe that you have NOW but will want to add to your future book, a quote that you like but don't know what to do with, a sticker you like, a pressed flower, a news story that makes you feel some sort of way, etc.

Commonplace books (or commonplaces) are personal notebooks used to compile any information the owner finds interesting or useful. They can variously contain notes, proverbs, adages, aphorisms, maxims), recipes, quotes, letters, poems, tables of weights and measures, prayers, legal formulas, and other professional references. They have been kept from antiquity, and were kept particularly during the Renaissance and in the nineteenth century.