It is in this, the second Holmes novel, that the great detective comes fully to life—not only as a melancholic and an inscrutable master of deduction, but also as an incurable drug addict. "Which is it today?" Watson asks Holmes matter-of-factly on the opening page of the novel, "morphine or cocaine?" "It is cocaine," Holmes famously replies. "A seven-per-cent solution. Would you like to try it?" Mary Morstan comes to Holmes in the hope that he will be able to solve a mystery. Ten years earlier her father, Captain Arthur Morstan, had returned to London on leave from his regiment in India where it is said that he and one Thadeus Sholto, "came into possession of a considerable treasure." By the time his daughter arrived at his hotel, he had vanished without a trace. The Sign of Four remains a small masterpiece of suspense, and the novel has enjoyed a steady readership ever since its first publication in 1890. In recent years, however, it has not been readily available except as a part of larger omnibus Holmes anthologies. This Broadview edition provides a reliable text at a very reasonable price. It contains textual notes but no appendices or introduction.

A wonderfully wicked new anthology from the editor of The Penguin Book of Gaslight Crime It is the Victorian era and society is both entranced by and fearful of that suspicious character known as the New Woman. She rides those new- fangled bicycles and doesn't like to be told what to do. And, in crime fiction, such female detectives as Loveday Brooke, Dorcas Dene, and Lady Molly of Scotland Yard are out there shadowing suspects, crawling through secret passages, fingerprinting corpses, and sometimes committing a lesser crime in order to solve a murder. In The Penguin Book of Victorian Women in Crime, Michael Sims has brought together all of the era's great crime-fighting females- plus a few choice crooks, including Four Square Jane and the Sorceress of the Strand.

First published in 1890, The Sign of Four is Sir Arthur Conan Doyle's second book starring legendary detective Sherlock Holmes. The story is complex, involving a secret between four ex-cons from India and a hidden treasure. More complex than the first Holmes novel, The Sign of Four also introduces the detective's drug habit and leaves breadcrumbs for the reader that lead toward the final resolution.

LITERARY COMPANIONS, BOOK REVIEWS & GUIDES. Everybody loves a list but this is a list of major ambition: namely, to select the best 100 novels in the English language, published from the late 17th century to the present day. This list has been built up week by week in The Observer since September 2013, and selected by writer and Observer editor Robert McCrum. With a short critique on each book, this is a real delight for literary lovers.

Sherlock and Dr Watson receive a visit from Mary Morsten, who offers up a particularly cryptic puzzle for them to solve. Her father went missing six years ago and since then she has received a pearl for every year he has not re-appeared. Now, the treasure's sender has requested a meeting and she would like Sherlock and Watson to accompany her.