Actually, I never heard of Midnight Louie until I read this book. My wife found it in a library search for stories by Lillian Jackson Braun. One of her stories from 1966, "The Dark One," is reprinted in this book, so it showed up in the search. The rest of the tales in this anthology are copyrighted 1998, same year as the book came out, which suggests they are new tales written especially for Midnight Louie's collection.
In each story, one or more animals plays a role in solving a mystery. In some cases, the animal itself is the detective, while in others, the animal provides a vital clue for his or her dumb humans. Not only dogs and cats, but also elephants, raccoons, an opossom, a lovebird, a robin, a half-wolf and a Tasmanian Devil take their turn at sleuthing here.
Some favorites: In "Daisy and the Silver Quaitsch," the neighborhood dogs literally dig up clues to tip off their clueless masters. "Kittens Take Detection 101," introduces us to two young cats (who don't even know how to use capital letters yet!) who find a dead body while sneaking out to explore their neighborhood. In "Final Vows," cats literally do have nine lives (or more!), and the feline detective, Colonel Mustard, returns from the dead to discover who poisoned him and help save the rest of the neighboorhood cats from the same fate. "On the Take" features a soft-hearted cop who finds a unique way to place stray cats in good homes. (If I lean toward the cat and dog stories, maybe it's because I have three dogs and ten cats. But the Tasmanian Devil get his due here, too, when a careless bomber sets off a charge near his cage, and "A Hamster of No Importance" solves a series of high-society Jewel thefts.)
Each story has an introduction by Midnight Louie, the feline detective created by Carole Nelson Douglas (who also happens to be the editor of this book.) Like I said, I had never heard of Louie before but, after enjoying this wonderful anthology, I plan to track him down and read more about his adventures. Carole Douglas, you have a new fan!