From WordNet (r) 3.0 (2006) [wn]:
bookstore
n 1: a shop where books are sold [syn: bookshop, bookstore,
bookstall]
From The Collaborative International Dictionary of English v.0.48 [gcide]:
Bookstore \Book"store`\, n.
A store where books are kept for sale; -- called in England a
bookseller's shop.
[1913 Webster]