A departure from this author's typical style (Dismas Hardy mystery series set in late 20th century San Francisco), this is one of two books Lescroart wrote in the style of Sherlock Holmes mysteries. This is by far the better of the two, set in Russia during the time of Czar Nicholas and Alexandra. Interesting characters, and a pretty good mystery, too.
In Son of Holmes, John Lescroart introduced August Lupa, reputed son of the greatest detective of all time...and possessor of a brilliant deductive mind in his own right. Now, in Rasputin's Revenge, Lupa is summoned to the court of the Russian Czar--where, with a bit of unexpected assistance from none other than Holmes and Watson, he untangles a chilling plot that holds the Winter Palace in a lethal grip . . .
Written in 1987 before he started the San Francisco stories, it's a sequel to Son of Holmes