Books like December Dog (Calendar Mysteries #12) by Ron Roy

The Alden siblings solve a mystery when they help locate a missing man.

When ghost boy Kaz is displaced by a demolition and meets the human girl Claire, who can see spirits, the two team up to uncover the mystery haunting the town library.

Rocky, a young bulldog living in a pet store, dreams of finding a loving home—especially since he prefers a quiet life over being a guard dog.

A heartfelt tale of a Kansas farm boy named Todd, whose advocacy for a shelter dog named Christmas leads his family and town to embrace compassion, reuniting people and animals with a simple yet powerful holiday program.

A snow‑filled holiday mystery: Nate the Great and his dog Sludge chase a missing card to reunite Fang with his family just before Christmas.

Pippin the pig learns the spirit of Christmas through a kind gesture, discovering that real gifts come from the heart.

"While nursing a broken heart, Josh Michaels is outraged when a neighbor abandons his very pregnant dog, Lucy, at Josh's Colorado home. But Josh can't resist Lucy's soulful brown eyes, and though he's never had a dog before, he's determined to do the best he can for Lucy--and her soon-to-arrive, bound-to-be-adorable puppies. Soon in over his head, Josh calls the local animal shelter for help, and meets Kerri, a beautiful woman with a quick wit and a fierce love for animals. As Kerri teaches Josh how to care for Lucy's tiny puppies and gets them ready to be adopted through the shelter's "Dogs of Christmas" program, Josh surprises himself by falling for her. But he's fallen even harder for his new furry family, which has brought incredible joy into Josh's life. He barely has time to sit down, between chasing after adventurous Sophie and brave Oliver, but when he does, his lap is quickly filled by the affectionate Lola. And Rufus and Cody's strong bond makes Josh wonder about his own relationships with his family. With Christmas and the adoption date looming, Josh finds himself wondering if he can separate himself from his beloved puppies. At odds with Kerri, Josh isn't willing to lose her, but doesn't know how to set things right. Can a surprise litter of Christmas puppies really change one man's life? The Dogs of Christmas is a charming and heartwarming holiday tale that explores the power of love, trust, and a basket full of puppies"--

When Neil and Bree Cady spend the summer with their aunts, they join friends Wesley and Eric to investigate the abandoned Greylock Hall, a psychiatric hospital rumored to be haunted by Nurse Janet’s ghost.

A kitten searches for his dog friend Max.

Clifford the Small Red Puppy comes back for his first winter adventure, brightening the snowy day with a sled ride and endless fun.