A murder in Chocolatetown. This book is set in a fictional town based on Hershey, PA, with a company that sounds a lot like Hershey. A cocoa buyer is murdered during a business convention. The investigation gives you a good look into the chocolate business, futures trading, and public television, all with a little tongue in cheek.
Tautly plotted, apparently well researched, and an amusing departure from the lean and desperate detectives who populate much of the mystery genre, I really enjoy the John Putnum Thatcher novels by Emma Lathan. Although now we have cozy detectives who have virtually every possible profession, at the time that these novels were written it was really revolutionary to make a polite and almost stuffy Wall Street banker the hero of a detective novel.
Emma Lathan's Thatcher novels may be the only mysteries I enjoy for their documentary value. Thatcher's work is explored and entwined with the mystery at hand. In this, her 15th Thatcher book, the focus is on cocoa futures. It may sound dry, but it works very well. Give it a chance!