When consumptive Doctor Edward Armstrong turns up at Baker Street with an invitation to visit a mysterious island, Sherlock Holmes smells a rat. Sounding deviously similar to the plot of a recent novel by celebrated lady author Mrs Christie, Holmes decides to send his inveterate side-kick Watson to the island, along with the Doctor's lovely, but wonky-eyed wife, Mary, and a well-known Scotland Yard detective. Taking Armstrong's place, the team determine to find out exactly what's going on, but before they've even left the mainland, one of the guests is murdered.

Adult humour throughout. 'The Watson Letters – Volume 5: Murder on Mystery Island' is book #5 in this Victorian comedy adventure series.

If you love historical mysteries, buy something else instead, but if you're into murder, fart-gags and innuendo, this'll be right up your Victorian street.