Saskatoon author Yann Martel sent Prime Minister Stephen Harper 100 books to read. (CBC)

The Saskatoon author who was sending the prime minister a new book every two weeks is ending the stunt, dubbed "What is Stephen Harper Reading?"

Yann Martel announced Wednesday that in the four years of his campaign he had shipped 100 books for Harper to read and that was a good number to end on.

'I can tease my prime minister for four years and not be arrested.'—Yann Martel

"It was kind of fun to do it," Martel told CBC News Wednesday. "I enjoyed it. I learned that I lived in a democracy [and] that I can tease my prime minister for four years and not be arrested. That was a good thing to know."

Martel's book selections included a personal letter. The Booker Prize-winning author of Life of Pi noted his project never elicited a direct response from Harper, although an aide to the prime minister did acknowledge the effort with a polite note.

Martel's campaign began with Leo Tolstoy's The Death of Ivan Ilyich.

Other selections have included A Clockwork Orange, and in a possible dig following cuts to arts funding, Martel sent off A Modest Proposal by Jonathan Swift.

Martel also had some fun with his book choices, once sending Harper a copy of a book by his political rival Liberal leader Michael Ignatieff.