Despite Phil Robertson's controversial remarks about the sin of "homosexual behavior" during a GQ interview earlier this month, sales of the Duck Dynasty star's book, Happy, Happy, Happy, have continued on an upward trajectory.

The book, which publisher Simon and Schuster elected to keep on the shelves amidst the fallout after Robertson's remarks were made public on December 18, saw an 86% increase between the weeks ended December 15 and December 22, according to the outlets that report to Nielsen BookScan, and sold about 35,000 copies. Lifetime sales for the bestselling book, released last May, come in at just over 630,000, according to BookScan.

After a briefly suspending Robertson from the program, Duck Dynasty airer A&E announced on December 27 that the star would be reinstated for future tapings.

Robertson's incendiary comments didn't seem to hurt sales for his Dynasty costars, either. The Duck Commander Family by Willie Robertson, Phil Robertson's son, saw a 66% increase in sales for the same period. Sales of Si-Cology by Robertson's brother Si increased by 45%, and sales for matriarch Kay Robertson's cookbook Miss Kay's Duck Commander Kitchen rose by 46%.