Owner Joe Russakoff explains the deals that have led to his store's expansion. "A new book that would go for $25 might go for $6 here."
The store has popular fiction, like "The Girl With the Dragon Tattoo," which originally retailed for $15 on sale for $6.
And there are similar bargains in all the departments including literature, mystery, and children's books. In addition to books, the store sells videos, DVDs and old snapshots. It's the type of store shoppers wander into and don't want to leave, spending hours sorting through the crowded shelves.
"People spend all day in here," Russakoff says.
Last month, Russakoff took over the store next door, former site of the Philly Aids Thrift Shop. The expansion has allowed him to better organize and display his extensive inventory.
And if you have old books at home, you might be able to shop at Mostly Books for free.
Russakoff explains, "You can bring in your old books, for store credit and then you save even more. There are people who've been shopping here for years and have never spent money. "
Mostly Books is open from noon to 7:00 p.m. Monday through Thursdays and from 11:00 a.m. to 9:00 p.m. on the weekends.
Click here to access the Mostly Books Facebook page.