Shoppers hoping to buy Michael Wolff's new Fire and Fury book on the Trump White House have accidentally been buying a book by a World War II historian that now finds itself on some of Amazon's bestseller lists, the Guardian reported.

The book by University of Toronto professor Randall Hanson, titled Fire and Fury: The Allied Bombing of Germany, 1942-1945, was published nearly 10 years ago, but Hanson noticed an uptick of sales activity late last week.

"It amused me," Hanson said. "Part of me thought: can people really be that dumb to be confusing these books?"

Some buyers were upset to receive Hanson's book, which "tells the story of the American and British bombing campaign through the eyes of those involved," according to its Amazon description.

"I had a couple of bitter comments," said Hansen. "There was one tweet, he came forward and said, ‘I bought this book by accident and there’s no way I’m reading it,' in kind of this accusatory tone. I thought, well, it’s not quite my fault, mate."

Hanson says he won't know exactly how many copies of his book were sold until he receives his royalty check next month.