A country house. Guests arriving for the weekend. A host whom almost everyone dislikes for one reason or another. An ideal set-up for a classic 1930s English murder mystery.
General Sir Arthur Billington Smith and his young wife, Fay, are entertaining a group of relatives and acquaintances at their home in the English countryside. Among the guests are Fay's sister, Dinah Fawcett, the General's son Geoffrey and his fiance, Lola de Silva, the General's nephew Francis, Basil and Camilla Halliday, and Stephen Guest, who appears to have feelings for the young Mrs. Billington-Smith. Several local neighbors join in the party at various times, including the local Vicar and his wife, and Mrs. Twining.
The General is not happy with just about everyone in his house, especially his son for bringing a woman of "questionable" character into his home and his own wife for extending the invitation in the first place. After a morning obligatory socializing with some of his guests, the General retreats to his study to work on his household accounts. Several hours later, he is found there slumped over his desk -- murdered.
Everyone is shocked at this violent event, but nobody is particularly upset at the General's death. In fact, suspicion falls upon just about everyone in attendance at the house as each person had a reason to see the man dead. A key piece of evidence at the scene - the unfinished clue of the title - is the beginning a word the General started before he died.
The Unfinished Clue had all of the key pieces of a classic murder mystery - an isolated setting, many suspects with motive and opportunity to commit the crime, and interesting characters that leave the reader (or at least this reader) guessing almost to the end who the murderer might be. It was missing a strong investigator, in my opinion; Inspector Harding of Scotland Yard certainly did his job and solved the crime but he seemed like a background character.
This was my first Georgette Heyer novel, and I did enjoy it. It reminded me a little bit of Agatha Christie's mysteries, which I loved; and I think given the opportunity I'd like to read more of Heyer's mysteries.