In the 14th installment of Barron’s Being a Jane Austen Mystery series, we meet a middle-aged Austen during the Year Without a Summer, when volcanic ash from the South Pacific shrouded the planet for months. Feeling unwell, Austen travels to the Cheltenham Spa in Gloucestershire with her sister Cassandra — but quickly realizes that a deadly threat, not a relaxing vacation, is in store. (Penguin Random House)