As nouns the difference between books and bro
is that books
is while bro
is (slang) brother; a male sibling.
As a verb books
Other Comparisons: What's the difference?
(pluralonly, accounting) Accounting records.
(slang) brother; a male sibling
(slang) brother; a male comrade or friend; one who shares one’s ideals.
(slang) brother; an African-American.
(slang) brother; (used to address a male)
(slang) a fratboy or someone that espouses the fraternity bro culture
* cool story bro