Breakaway (1980)

Detective inspector Sam Harvey, better known to the general public as the author of the latest best-seller for ages 3 and up, 'Breakfast at the Zoo,' would like nothing better than to retire so he can devote himself full-time to penning the riveting sequels 'Lunch at the Zoo' and 'Dinner at the Zoo.' However, he has to solve a couple of complicated murder cases first. Plot twists and red herrings abound in this intricate thriller series, and corpses turn up with distressing regularity before the culprits are finally collared.