cookery book vs reference book

cookery book and reference book both are nouns.

Word	Noun	Adjective	Verb	Adverb
cookery book	Yes	No	No	No
reference book	Yes	No	No	No

As nouns, reference book is a hypernym of cookery book; that is, reference book is a word with a broader meaning than cookery book:

Other hypernyms of cookery book include book of facts, reference, reference work.

cookery book (noun)	reference book (noun)
a book of recipes and cooking directions	a book to which you can refer for authoritative facts