Other adventures of Sherlock Holmes

A study in scarlet
The first Sherlock Holmes' adventure. It's in this story that he mets his old friend and companion, Watson, who will stay in his side during all his exploits.
In this book, the police ask Holmes to help it in a strange and misterious case: a man was found on his house, full of blood, but without any injury. The hero of British Literature must discovery what killed him, and how.
The hero apears just in the first part. In the second part, Doyle tells the public a few of the Old West, in the United States of America (USA).

The sign of four
In this story, a lady, whose name is Marry Morstan, ask Holmes to discovery her father's death reason, who died ten years ago. After four years after his death, she started receiving a pearl for year, but she didn't know who was sending that.
After six years receiving pearls, a person (the one who was sending the jewels) plans a date, and tells her this plan.
The girl, with fear, ask Holmes some help to see if she can go to the date in security.

The hound of the Baskervilles
The most exciting adventure of Holmes. It tells the story of an English family, The Baskervilles, and a diabolical dog. In XVII century, more or less, Hugo Baskerville was murdered by this monster, which has fire on the eyes and the mouth. So, the legend was criated: that this beast, since Hugo Baskerville's death, haunts the family.
Chrles Baskerville, the youngest man of the family, died in the same way. His friend, Dr. Mortimer, asks Sherlock Holmes to sove the Baskerville's beast case, and to save the new dweller of the house: Sir. Henry Baskerville, Charles' nephew.

The valley of fear
It's a story of a man whose face exploded with a shot. Sherlock Holmes analyzes the place, the people and the injuries, and molds a conclusion in the first part of the book. The second part tells the public the circumstances in what the story was inspired.