The Sign of Four (Penguin English Library) (Easy Read Sherlock Holmes) (Easy-to-Read Sherlock Holmes)

One day the doorbell rings. Watson opens the door.
A young woman is standing there.
Such beautiful blue eyes, and what a sweet face, he thinks.
‘I’m Mary Morstan. I’ve heard you can solve difficult cases.’
Watson chuckles. ‘Oh no, you’re looking for my friend Sherlock Holmes, but come on in. You can tell him yourself what’s up.’

After the mysterious disappearance of her father, the beautiful Miss Morstan starts to receive a present each year -
a rare pearl. Who is sending the pearls, and why does her secret benefactor suddenly want to meet with her?
The spellbinding mystery unfolds as Sherlock Holmes and his friend Dr. Watson are caught up in a cat-and-mouse chase,
pursuing an Indian treasure and a murderer whose ominous trademark is ‘the Sign of Four’.