IPA: /ˈbʊkˌstɔl/
KK: /bʊkstɔl/
A small stand or booth where books are sold, often found in public places like streets or markets.
I found a rare novel at the bookstall in the park.
Bookstall → It is formed from "book" (from Old English *bōc*, meaning a written work or text) and "stall" (from Old English *staell*, meaning a place or stand). A bookstall is a place or stand where books are displayed or sold.
Think of a 'written work' ('book') being displayed at a 'place' ('stall') — that's what a bookstall is.