Apparently not according to the Indigo book chain:

Charges that Indigo is "boycotting" Mark Steyn's book, America Alone, are ludicrous. Mr. Steyn's book was for sale at Indigo's channels in September of this year and it promptly sold out. Indeed we should have purchased more initially but the moment we realized the error, we immediately placed a reorder for several thousand more books. As of this moment, we, as well as most other book retailers in Canada, are still awaiting new copies from the publisher, which we are told will arrive in mid-November.

There will always be a whiff of suspicion when it comes to the apparent clash between Steynesque theories about modern history and Canada's media barons. But for now, the issue is settled. (hat tip: Glenn).