Used trade paperback.
London is plagues by mysterious crimes: a fruit vendor sees an apple hanging in mid-air like a balloon, a petty thief claims to have seen a ghostly apparition with internal organs visible, and a large quantity of obscure drugs has been stolen from London Chemists. Scotland Yard is baffled - only The World's Greatest Detective can solve the mystery of the Invisible Man.
A Case Of Blind Fear is the authorized sequel to Scarlet In Gaslight and features appearances by Dr. John H. Watson, Colonel Sebastian Moran, and Irene Adler.