vade mecum vs book of facts

vade mecum and book of facts both are nouns.

Word	Noun	Adjective	Verb	Adverb
vade mecum	Yes	No	No	No
book of facts	Yes	No	No	No

As nouns, book of facts is a hypernym of vade mecum; that is, book of facts is a word with a broader meaning than vade mecum:

vade mecum: a concise reference book providing specific information about a subject or location
book of facts: a book to which you can refer for authoritative facts

Other hypernyms of vade mecum include reference, reference book, reference work.

vade mecum (noun)	book of facts (noun)
a concise reference book providing specific information about a subject or location	a book to which you can refer for authoritative facts