The latest one is called "Terror At The Fair" and is set at the Chicago Railroad Fair in 1949. In it Snap has been assigned to what looks like a summer of writing boring feature stories about this exposition celebrating 100 years of railroads in Chicago. It isn't long before murders begin to occur and the case is finally solved witha little help from Walt Disney.
A couple of months ago we posted on ChiTownView a video clip from the Chicago Railroad Fair that shows the stage show "Wheels A Rolling". Which in the book is the scene of the first murder. See below for more on the fair and this video.
The author is probably even better known for his series of mysteries that revived Nero Wolfe's character Rex Stout. You can read more about Bob and his books at his web site.
Noted train enthusiast Walt Disney visited the fair in 1948. He was so taken by it that he was inspired to create his own amusement park which of course became Disneyland.
This clip shows us the "Wheels A-Rolling" pageant which traces the development of railroads & Chicago. It was was put on twice a day and viewed by thousands of people at a time. For more about the fair visit the Wiki page.