I sat on this one for a minute. I was hooked from the very beginning. I enjoyed getting to know the characters. The mystery was intriguing. That being said, and maybe it's because this was an audiobook or maybe it was just me... there were just so many characters that I started to get confused around the second half and towards the end of the book. Almost to the point where I was starting to lose interest. There were so many characters with their real names and alias being revealed, I had a hard time keeping up.
That being said. I really did enjoy the book. It was witty with an interesting story. I LOVED the cat and was actually what drew me to the book. I need more Marmaduke!

'The Secret Detective Agency' strikes a great balance between serious WWII-era espionage and a cozy mystery (quirky characters, small-town setting, a notable pet). The puzzle itself is well written and without unnecessary fluff. My favorite lead is Arthur Cilento - he is humble, analytical, and brave. Miss Jane Treen is an interesting companion - capable, strategic, and perceptive, but I find her a bit insensitive.

If you enjoy reading cozy detective fiction, then I recommend Helena Dixon's book to you! Kristin Atherton does a great job narrating the various characters.

Special thanks to Bookouture Audio and NetGalley for a complimentary copy of this audiobook. Opinions expressed in this review are completely my own.