Dozens of books bearing U.S. President Donald Trump’s face on their covers have been piling up at bookstores across the nation since his stunning victory in November.

But sales so far have been lackluster compared to how former President Barack Obama-related books did when he assumed the presidency in 2009, according to bookstores and publishers.

"Obama-related books did really well when he became the president for the first time. ... I remember a book comprising Obama's speeches was so popular that the piles disappeared quickly before our eyes," said Naoaki Matsumoto, a Maruzen bookstore employee in Tokyo's Marunouchi district.