Hi, Olga and tamberine!
Olga, thanks for the links. I did email Amazon.ca to see if they would be getting both games in stock, but they don't know yet. I am going to order "The Testament of Sherlock Holmes" from Future Shop and will keep checking for "Nancy Drew" Deadly Device". Amazon.ca does have that one through a third-party seller, but it's $26.99 plus S&H.
tamberine, thanks for the suggestion about purchasing the games from eBay, but I only go that route as a last resort. Most of the sellers are located in the States so, if the game is flagged by Canada Customs, I'll get dinged for customs charges.