On Tuesday, Rushdie's book "The Satanic Verses" was the top seller on Amazon.
The author's agent said he could lose an eye from the attack. The award-winning novelist was taken off a breathing machine on Saturday and was able to speak again.
Over the course of three decades, Rushdie has dealt with death threats and a $3 million bounty on his head. The fatwa against Rushdie was issued by the former supreme leader of Iran.
On Monday and Tuesday, "The Satanic Verses" was the top-selling book on Amazon.
The book was the #1 best seller in Amazon's literary satire fiction and contemporary british and Irish literature lists. The Spanish version of the novel was the best seller in the literature and fiction section. The archives of Rushdie's books were recovered by the Internet Archive's Wayback Machine.
As seen in Wayback Machine's archive of Amazon's Best Seller page, the title did not make the top 100 last week, but it did make the top 27 on Tuesday.
His other books, including "Midnight's Children" and "Joseph Anton: A Memoir" had similarly topped the Best Seller list for the Asia Myth & Legend and Religious Intolerance section respectively, where the former had previously not broken top 50.
The motive of the individual arrested after the attack on Rushdie is unknown.
When asked if sales of Rushdie's books were better after Friday, Amazon couldn't give a sales data. Random House, Rushdie's publisher, was not available for comment.