Leviathan

«Leviathan» — this is the third book by Boris Akunin about the adventures of Erast Fandorin.
In a fashionable district of Paris, the British collector Lord Littleby and all the staff of the mansion are brutally murdered. 
From the renowned collection of... Eastern rarities, a unique golden figurine of the Indian god Shiva and one of the painted Indian shawls are stolen. 
The case is investigated by detective Gustave Gosh from the Paris prefecture. In the hand of the deceased, he discovers the emblem of a golden whale.
As it turns out, this emblem belongs to the wonder ship "Leviathan," which is embarking on its maiden voyage to India.
All first-class passengers were given such a golden whale along with their ticket.
But who among them could commit such a terrible crime?
Five people are suspected, all of whom are missing a golden whale. Among them is Erast Fandorin.