Library Audiobook Mysteries

My grandmother enjoys mystery novels.

I am thinking of getting her an MP3 player so we could listen to audiobook mysteries together and have another thing in common to talk about.

I somehow grew up without reading the classic mystery novels that define the genre. In contrast, the bookshelves at my wife's mother home are lined with such books.

Curious, I made a list of the authors for which my mother-in-law owns the most books and then searched for how many audiobooks for each author are part of the Eugene Public Library collection. The results are:

• Agatha Christie: 53
• Lilian Jackson Brown: 21
  
• Dorothy Gilman: 13
• Dorothy Sayers: 4
• Josephine Tey: 1
  
• Dell Shannon, Susan Dunlap, Amanda Cross: 0
  

Clearly the Eugene Public Library's audiobook collection is not a representative sample of mystery writing that features female authors.

I repeated the experiment with a few other major mystery novelists who were male.

• Ross Macdonald: 9
• Dashiell Hammett: 4
• Gilbert Keith Chesterton: 1
• Raymond Chandler: 0
  

Not a whit more representative.

For the fans of mystery novels out there, what audiobooks should I first request the library acquire?