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Randall Hansen, the interim director of the 91�Թ�'s Munk School of Global Affairs, is seeing a bump in sales for his 2008 book, which happens to also be titled Fire and Fury.

Since Friday when Michael Wolff's tell-all book Fire and Fury about the Trump presidency was released, not only has Wolff's book been selling off the shelves, but the 91�Թ� political science professor has seen his own book land on three bestsellers' lists.

Read about how the Fire and Fury mix-up has gone viral

Hansen said he never thought that he'd see a rise in sales of his own book, titled Fire and Fury: The Allied Bombing of Germany, 1942-45, when Wolff's book was released. He began noticing on Friday that his own book, which tackles the American and British bombing campaigns against Germany during the Second World War, was appearing on three bestseller lists on Amazon – military history, strategy and aviation. 

“Trump’s use of the phrase generated only limited Twitter commentary, and I assumed that the very different topics would result in little interest in my book,” Hansen said, speaking of Trump's “fire and fury” threat to North Korea back in August.

Early Saturday morning, Hansen tweeted about the unprecedented sales for Wolff’s book leading to an increase in sales for his own book. He said the increase in sales was incredible but wondered if he owed royalty cheques to Donald Trump and Steve Bannon.

“If so, the irony will know no limits,” Hansen tweeted.

That tweet has now gone viral.

"It's not my fault people can't tell the difference between a book about Trump and a book about the bombing of Germany," Hansen told The Canadian Press. "But most have been jovial and appreciated the moment of levity."

 Hansen said he won’t know until he gets the royalty statement how many books he's sold since Friday. He has also authored Citizenship and Immigration in Postwar Britain in 2000 and Disobeying Hitler: German Resistance after Valkyrie in 2013. 

Incredibly, sales of my have increased. Will I owe a larger royalty cheque to Bannon & Trump? If so, the irony will know no limits.

— Randall Hansen (@ProfRAHansen)