Your teacher "has a way with words" <- a common phrase you will hear.
I think they are using definition (2) to mean keep referring to your books be in harmony with them and possibly also as in definition (1)
join in marriage.
"I was married in church"
synonyms: get/be married, wed, be wed, become man and wife, plight/pledge one's troth; More
join together; combine harmoniously.
"the show marries poetry with art"