Murder on the Page by Daryl Wood Gerber

It’s a truth universally acknowledged that a genuinely top-notch party must be in want of a theme. Allie Catt, caterer and personal chef in the beautiful mountain community of Asheville, North Carolina, has devised a winning formula by using her clients’ favorite books as inspiration. Her first themed event is based on Pride and Prejudice (Allie’s cat, Darcy, approves), and it’s so popular that soon she has grand ideas for future parties based on Rebecca, The Great Gatsby, Babette’s Feast and more.
Business is booming, and a rival catering company is fuming. But there’s a sting in the tale when the aunt of one of Allie’s clients and best friends, Tegan, is murdered. Tegan is the victim’s sole heir, and quickly becomes the main suspect. Allie has no doubts about her friend’s innocence, but how to prove it?
Once again, her love of literature comes to the rescue, and with some guidance from her favorite fictional detectives, including Hercule Poirot and Sherlock Holmes, Allie sifts through the clues.
With a little luck—and the kind of pluck that would make Elizabeth Bennett proud—she may be able to stop a killer from serving up a second course of murder . . .