本书收录了《血字的研究》和《四签名》两个故事，给读者呈现一个冷静、智慧与勇气并存的神探福尔摩斯。本书为英文版。

匪夷所思的事件，扑朔迷离的案情，心思缜密的推理，惊奇刺激的冒险。伟大的侦探，永远的福尔摩斯。这个身材瘦削、头戴猎帽、肩披风衣、口衔烟斗的神探形象已经深入人心。福尔摩斯探案是探案小说永远的经典之作、顶峰之作。

A STUDY IN SCARLET

Part One

Chapter 1 Mr.Sherlock Holmes

Chapter 2 The Science of Deduction

Chapter 3 The Lauriston Garden Mystery

Chapter 4 What John Rance Had to Tell

Chapter 5 Our Advertisement Brings a Visitor

Chapter 6 Tobias Gregson Shows What He Dan Do

Chapter 7 Light in the Darkness

Part Two

Chapter 1 On the Great Alkali Plain

Chapter 2 The Flower of Utah

Chapter 3 John Ferrier Talks with the Propher

Chapter 4 A Flight for Life

Chapter 5 The Avenging Angels

Chapter 6 A Continuation of the Reminiscences of John Watson,M.D.

Chapter 7 The Conclusion

THE SIGN OF FOUR

Chapter 1 The Science of Deduction

Chapter 2 The Statement of the Case

Chapter 3 In Quest of a Solution

Chapter 4 The Story of the Bald-Headed Man

Chapter 5 The Tragedy of Pondicherry Lodge

Chapter 6 Sherlock Holmes Gives a Demonstration

Chapter 7 The Episode of the Barred

Chapter 8 The Baker Street Irregulars

Chapter 9 A Berak in the Chain

Chapter 10 The End of the Islander

Chapter 11 The Great Agra Treasure

Chapter 12 The Strange Story of Jonathan Small