I'm currently reading Lost Under a Ladder by Linda O. Johnston. This book is the first in the Superstition Mystery series.
Rory Chasen is looking for answers. Her fiance died after walking under a ladder. Did he die because of a superstition? Are superstitions real? Rory decides to travel to Destiny, California to attempt to learn the truth about superstitions. Fate may have more in store for Rory and her dog, Pluckie, than she imagined. On her first day in town Pluckie leads her to Martha, the owner of the Lucky Dog Boutique, who has just been injured. Surprisingly, Martha asks Rory to manage her store while she recuperates. Why didn't she choose one of her employees, or her more than willing nephew? Pluckie soon leads her to another body, one of the owners of the Broken Mirror Bookshop who wrote the book on superstitions that led her to Destiny. This time, its more than an injury, it's murder! Now Rory must not only look for answers about superstitions, but look out for a murderer as well!