In addition to being available in bookstores worldwide, you can order titles from the following sources:
Vancouver Kidsbooks offers The Longlight Legacy, Skud, and Double or Nothing.
Chapters/Indigo offers The Longlight Legacy, Skud, Double or Nothing, Little Criminals and many of my other titles.
AbeBooks offers many out of print books and plays, availability fluctuates wildly.
The Playwrights Guild of Canada and Playwrights Canada Press offer most of the plays.