bookend

[ boo k-end ]
/ ˈbʊkˌɛnd /

noun

a support placed at the end of a row of books to hold them upright, usually used in pairs.
one of two things occurring or located at either end of something else: two events that served as bookends to my career.

verb (used with object)

to occur or be located at the beginning and end of: His term in office was bookended by crises.

Origin of bookend

First recorded in 1905–10; book + end1