The Loch Ness Papers by Paige Shelton
The Loch Ness Papers is #4 of the Scottish Bookshop Mysteries. It does work as a stand-alone but like so many series books, it's better if you have all the background and know the characters and their quirks. And the books are all set in and around a unique little bookstore in Edinburgh, Scotland, so really, why wouldn't you want to?
Delaney and her handsome-as-all-get-out pub owner Tom are getting married in a week or so, but of course, a mystery has to pop up. Delaney meets the slightly-off-his-rocker Norval Fraser who is a firm believer in the existence of Nessie and has a houseful of papers and artifacts to try to prove it. The next day, Norval's nephew is found murdered and Norval is hauled off by the police - and Delaney needs to help him out.
I feel like I am just repeating things I've said before. Delaney and her friends are warm and smart and funny. The setting...