The Incredible Crime was just that - unbelievable.
The plot was utterly ridiculous. For much of the book I was left wondering if there was a crime at all because there was no real plot. All we had was a CID inspector mentioning to our main character, a young woman and daughter of The Master of one of the colleges, that he suspects a drug smuggling operation to be based in Cambridge.
I still have no real idea why the CID inspector mentions this to our intrepid main character.
I also have no idea why it took 80% of the book to get the plot moving.
There was so much stuffing and distraction by a romance sub-plot that the mystery took a backseat until the very end of the book. And I mean the last four or five chapters out of thirty-two.
And as for the romance sub-plot... Gaaah.(show spoiler)