The Adventures of Sherlock Holmes
Sir Arthur Conan Doyle
A Case of Identity:
Miss Mary Sutherland, angry and beside herself with feelings of loss, asks Sherlock Holmes to solve the sudden, mysterious disappearance of a shy and attentive man she has grown to love upon the very day they were to be married.
The Boscombe Valley Mystery:
Lestrade summons Holmes to a community in Herefordshire, where a local land owner has been murdered outdoors. The deceased's estranged son is strongly implicated. Holmes quickly determines that a mysterious third man may be responsible for the crime, unraveling a thread involving a secret criminal past, thwarted love, and blackmail.
You can read my reviews on the other Sherlock Holmes stories here.
In A Case of Identity, I got the point as quickly as Mr. Holmes himself. In one of the Sherlock episodes they do an adaptation of this one (very quick) and it's really similar.
The Boscombe Valley Mystery was my favored of the two, because I liked that they traveled, and that there was a little bit of Mary in the beginning. Also, this story was complex- there is strong, substantial evidence pointing to a certain culprit, and yet the legendary detective comes up with ridiculous and complicated and absolutely brilliant deduction that explains all the findings with a completely different outcome. It was terrifically enjoyable, and a lot of build-up. I guessed the guilty party of this one, too, but I had no idea how he'd prove it so it was a definite page-turner.