There's a Canadian publishing house called Dundurn Press (
http://www.dundurn.com/) which I can recommend as well. It publishes, among other things, a line of crime and mystery titles (
http://www.dundurn.com/books/browse/category/FIC022), many under the "Castle Mystery" imprint. It's author roster includes Michael Blair, Don Easton, Jack Hawkins, Marc Strange, Eric Wright and several others. All of the titles appear to be available as e-books from Kobo at around the $7 mark.
In 1984, Eric Wright published the first of eleven Inspector Charlie Salter novels, about a Toronto cop in mid-life whose career has been sidelined. When a Toronto University professor turns up dead in Montreal, the local police ask for assistance (they are too busy) and Salter gets the job because no one else is interested. As Salter continues to investigate, his joy in police work returns, and he redeems himself, personally and professionally, from the dead-end he thought he was destined for.
The Night the Gods Smiled won the Arthur Ellis Award for best novel from the Crime Writers Association of Canada. This is light fiction, with some wry humour, and a few quirky characters.
Dundurn has reissued this with two other Charlie Salter stories in an Omnibus edition.