I’m no expert on Diana Wynne Jones, but it doesn’t take a genius to realize she was a cat person. Felines–especially the magical, clever sort–regularly get starring roles in her books, whether it’s Plug-Ugly in The Islands of Chaldea or Midnight and Whippersnapper in Castle in the Air. No matter how powerful the cats are, they inevitably behave like cats, by turns hungry, opinionated and irritatingly indecisive.
Patricia MacLachlan, on the other hand, is definitely a dog person. Her canines tend to be loyal and slightly magical. They comfort the dying in Kindred Souls, help rescue people in The Truth of Me, and even counsel parents in Waiting for the Magic (to be fair, there’s a cat in this book too, but the canine:feline ratio stands at 4:1).
Other authors have non-animal hobbies and/or obsessions that reliably appear in their stories. I suspect Gary D. Schmidt is quite the baseball fan, as evidenced by The Wednesday Wars and Okay for Now. Madeleine L’Engle probably loved classical music, since there’s a lot of singers (mostly of church music) and pianists in her books. In The Young Unicorns, music literally saves lives.
Elizabeth Wein, obviously, is a pilot, and flying is crucial in both Rose Under Fire and Code Name Verity, not to mention her short stories. And it seems her next book is about pilots-in-training (Ethiopia and airplanes–what a way to combine her two series)!
No Brian Jacques book is complete without mouth-watering feasts. I’ve heard he took great care with his descriptions because he started out writing for kids at a school for the blind. Whatever his reasons were, he’s inspired countless readers to attempt cooking his woodland fare…with mixed results.
Like Jacques, Laura Ingalls Wilder liked writing about food, but it usually comes across as gratuitous or slightly desperate (do we really need a description of every meal eaten by Almanzo in Farmer Boy?) Of course, it all makes sense when you consider the author’s childhood of near-starvation (remember her gaping incredulity when she got peppermint candy and a heart-shaped cake for Christmas in Little House on the Prairie? Meanwhile, Almanzo’s mother kept her house regularly stocked with home-made doughnuts). No wonder Laura found such joy describing her husband’s privileged upbringing.