The Tale of Briar Bank by Susan Wittig Albert
Near Sawrey, the seat of Miss Beatrix Potter’s country home, has been abuzz ever since Mr. Wickstead met his death under a tree limb. Many believe it had to do with a treasure he had dug up. And only Pickles, his dog, knows what happened. Meanwhile, Miss Potter faces dilemmas in her love life and with her parents. But she has no time to muse, what with helping humans and animals alike and this little matter of murder.