Barnes & Noble says sales of its new e-book reader, the Nook, helped spur online sales in the fiscal third quarter, but in-store sales were weaker.

Profit fell 6 percent to $80.4 million, or $1.38 per share. That beat analyst expectations of $1.34 per share.

Revenue rose 33 percent to $2.17 billion.

The revenue gain stemmed from the addition of the Barnes & Noble College Booksellers unit, which the company bought back from its own chairman in August.

In-store sales fell 5 percent to $1.4 billion. Online sales jumped 32 percent to $210 million. Online sales accelerated throughout the quarter, rising 67 percent in January.

Barnes & Noble launched the Nook late last year as a way to enter the fledgling e-book market.