Black Tie Blackmail - Men Who Stitch Mysteries, #4

It's the wedding of the century! Well, for Prospector's Rest, anyway. Yes, the tiny North Carolina mountain town which mostly survives on crafting is abuzz with preparations for the double wedding of Sheriff MacBeth (Mac) Welles and her man, Officer (and secret crafter) Obadiah (Di) Goode, alongside her deputy, Alex Martinez, and his sweetie, Officer Candice Worthy. In fact, the whole town of 300 (or thereabouts) is invited.
The one person who's not so excited is Mac herself. Does she want to finally begin her official life together with the man she's been in love with since they were both in the playpen? Absolutely! Does she want to get all gussied up and trotted around in the dog-and-pony show of the actual nuptials themselves? Not so much. Still, Mac's desire to get the big day over with takes a backseat when the entire Sheriff's Department starts getting old-school blackmail notes, with all the letters cut out and pasted in from magazines as though it's still the 1970s or something.
And then one of these "I know what you did when .