Monsieur Pamplemousse has inspected his last
For me, those were if not his best (hard to beat Paddington, after all) then his most enduring creations. For those that didn't know, he was a Francofone and Francophile of extremely long standing, I also have a book of his on France. The Pamplemousse books are adult comedy whodunit, the lead character of which, the said Pamplemousse, is an inspector for "Le Guide" - a fictionalised Michelin-esque publication, nearer Gault Milleau in its aims, who travels france in his 2CV with his Great Dane, Pomme Frites.
ETA: I've just troughed a few of them onto my kindle