I know The Island is supposed to be her great work. Do you have any others you'd recommend?
I know of
The Island as the alternate title for one of her most ingenious works
, And Then There Were None which is justifiably a classic of the genre. In addition to
And Then There Were None, it's hard to go wrong with the following half dozen:
The Murder of Roger Acroyd
Peril at End House
The ABC Murders
Five Little Pigs
A Murder Is Announced
Murder at the Vicarage
Not a fan of
Murder on the Orient Express or
Death on the Nile which often get included in discussions of Christie's best work.
Generally speaking, with exceptions both ways, the post-World War II novels are not as good as her earlier works.