、。
The price of books has been going up lately.
Literal
Recently, book [attributive-の] price [subject-が] rising-[change-over-time-てくる]-[ongoing-ている].
A notable stack of auxiliaries: 上がる ('rise, go up') + ~てくる ('come to / change into a state over time, toward the present') + ~ている (ongoing state). The combination captures a gradual trend continuing into the present — 'has been gradually rising up until now.' This is the change-over-time use of ~てくる, distinct from its 'action and return' sense.