Barnes and Noble is a very popular bookstore throughout the U.S., I know.
I really like this bookshop. It's BOOK GALORE (obviously). They sell all my favorite magazines and books for reasonably prices.
Aside from selling books and magazines, thet have little tables that you can sit at with your kids and read to them (obviously).
ALSO, they sell shirts, mugs, calendars, and books that say "Lowell or City of Lowell" on them. Cool. City pride.