Current NYT bestseller top 5:
The Help Amazon $9.99 B&N $9.99
Hit List Amazon $12.99 B&N $12.99
Water for Elephants Amazon $4.17 B&N $9.99
State of Wonder Amazon $12.99 B&N $12.99
The Kingdom $12.99 B&N $12.99
So, out of the top 5, 4 of them are priced the same by Amazon and B&N. Perhaps you could give us some examples to illustrate your complaint.