Booksellers

2 clues
Proprietors for word lovers
Barnes & Noble and competitors
Similar answers:
Accountbooks
Artbooks
Audiobooks
Badbooks
Badspellers
Baezandsellers
Balancethebooks
Bankbooks
Bannedbooks
Bantambooks
Bestsellers
Bestspellers
Bluebooks
Boardersbooks
Books
Booksaflight
Booksahead
Booksale
Booksamillion
Bookscan