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The Stolen Bacillus and Other Incidents
In the title story a bacteriologist impresses an interested visitor with the deadliness of the cholera germs he keeps in a sealed tube in his laboratory. But all is not as it seems - neither of them are being truthful. As well as science-fictional stories, there are several which involve explorers/soldiers (of course Wells was writing in the days of the British Empire and so had a different viewpoint to the one we have today), and throughout the book the reader gets a glimpse of the nature of British society at the end of the nineteenth century.
Note: you can download this book at http://www.gutenberg.org/etext/12750