Monsieur Pamplemousse on Vacation, is by the sadly now deceased (6/27 at age 91) Michael Bond, who also wrote the Paddington Bear series for children. The Monsieur Pamplemousse books are a series for adults about a former detective with the Surete, who took early retirement under somewhat of a cloud and who now -with his trusty bloodhound Pommes Frites- travels around writing restaurant reviews for French gastronomic publication Le Guide and getting into all kinds of comic difficulties. This book is #13. I'm going to read them all, but not necessarily in order.
from the back of the book:
Monsieur Pamplemousse is looking forward to a well-earned break in the South of France courtesy of his employer -all he has to do is collect a piece of artwork for Le Guide's Director. But when his contact fails to show and a dismembered body is washed up outside the hotel, the holiday mood evaporates.
As Pamplemousse struggles with the case (and with modern technology) his ever-faithful bloodhound Pommes Frites is on hand offering proof why, during his time with the Paris Surete, he was one of their top sniffer dogs.
I have also read the following others from this series:
#2 Monsieur Pamplemousse and the Secret Mission
#6 Monsieur Pamplemousse Investigates
#8 Monsieur Pamplemousse Stands Firm
#11 Monsieur Pamplemousse Afloat
#12 Monsieur Pamplemousse on Probation
#14 Monsieur Pamplemousse Hits the Headlines