Guest Post, by Liz Milliron

Catriona writes: It's lovely to welcome back a good friend of the blog, Liz Milliron, who is celebrating the launch of her fourth Homefornt mystery - THE TRUTH WE TELL. I'm a huge fan of this beguiling series about blue-collar hero Betty Ahern in 1940s Buffalo. By day Betty does her bit for the war effort in an aircraft engineering works, by night she sleuths; hence the "Sam Spade meets Rosie the Riveter" log line! 

Just like Betty, Liz is pitching right in today, answering the question of the we...